User Retention: Using On-Chain Data to Trigger Off-Chain Marketing

When it comes to keeping users engaged, data is everything, right? Well, in the world of blockchain and cryptocurrencies, that data is often on-chain, and it can provide some serious insights into user behavior. Let's dive into how we can leverage that on-chain data to boost our off-chain marketing efforts.

What’s On-Chain Data?

On-chain data refers to all the information that's stored directly on the blockchain. This includes transaction histories, smart contract interactions, and wallet activities. Basically, it's like a digital fingerprint for every user engaging with the blockchain.

Why Should We Care?

Here’s the deal: understanding on-chain activity can give you a clearer picture of how users interact with your platform. This can help tailor your marketing strategies to meet their needs better and keep them hooked.

Key Benefits of Analyzing On-Chain Data

• Personalized Marketing: With insights from user activity, you can create more targeted campaigns.
• Churn Prediction: Spot trends that indicate when users might be losing interest, allowing you to intervene before they leave.
• Engagement Boost: Identify what features or services users love and promote them effectively.

How to Use On-Chain Data for Off-Chain Marketing

So, how can we turn that data into actionable marketing insights? Here are a few strategies to consider:

1. User Segmentation

By analyzing on-chain behaviors, you can group users based on their activity. Are they regular traders? Do they participate in governance? Segmenting users lets you tailor your messaging:

• Active Traders: Send them market updates or trading tips.
• Hodlers: Share more about your long-term vision or upcoming features.

2. Retargeting Campaigns

Ever clicked on a product but didn't buy it? Retargeting is all about bringing those users back! Use transaction data to see who interacted with your product but didn't complete their purchase, and create marketing campaigns aimed right at them.

3. Content Creation

Engage users with content that resonates with their interests! If your data shows that a lot of users are focused on DeFi, consider writing blog posts or creating videos explaining the latest trends in that space.

4. Feedback Loops

On-chain data allows you to monitor which features users are using and which ones are collecting dust. Use this info to ask for feedback and make improvements, then communicate those changes!

Conclusion

Leveraging on-chain data for off-chain marketing can be a game-changer. By understanding user behavior through on-chain insights, you can create more personalized experiences and keep users coming back for more. So, dive into that data and get started on crafting your marketing strategies!

For more tips on user retention and marketing in the crypto space, keep an eye on our blog!

“Our CRM can’t ‘see’ wallet behavior in time to act.”

• Your customers are all over the place, minting, swapping, staking, and bridging across chains. But guess what? Those actions aren’t hitting Braze or SFMC for minutes--sometimes way longer. As a result, your customer journeys are stuck in time-based modes, not adapting to real behavior. This means stale messages, higher churn, and wasted efforts on paid retargeting. Not a great combo!
• Here are some common technical hurdles we’re noticing:
  • First up, there’s no standardized wallet identity across chains or smart contract wallets. SIWE works for EOAs, but many users are stuck with SC wallets or fancy pre-deploy accounts. If you’re lacking EIP‑1271 (contract signatures) and ERC‑6492 (pre-deploy signature wrapper) support, your authentication could crash on day one. Check it out here: (eips.ethereum.org).
  • Then there’s the whole RPC polling and DIY indexers situation. They tend to miss events, might double-count during reorgs, or just give up when new L2s come on board. Your BI team might find themselves spending sprints just cleaning up duplicates and figuring out the difference between “confirmed” and “unconfirmed” states. Talk about a headache!
  • Let’s not forget about those warehouse-to-CRM syncs--talk about a batch job. CRM APIs come with some strict rate limits, too. If there’s a sudden mint or airdrop, you can expect a meltdown with 429s popping up everywhere. This totally ruins those critical moments. For instance, Braze’s /users/track allows only 3,000 requests every 3 seconds with a maximum of 75 events per call. If you ignore batching, you’ll end up throttling your campaigns. Just a heads-up: (braze.com).
  • Lastly, compliance can seriously slow down procurement. Privacy teams are hesitant to give the green light for linking PII to wallets unless you can demonstrate ownership without storing sensitive data and show that your vendor is SOC2-ready.

The Hidden Business Risk

• Missed Deadlines: When teams get stuck debating “what is identity?” launches start to slide. Every week without those on-chain triggers just adds to reacquisition costs and drags down lifetime value (LTV).
• Measurable Uplift You’re Not Capturing:
  • Combining in-product and out-of-product messaging is a game-changer, driving 82% retention over 30 days compared to just 15% with no outreach. And those real-time, action-based triggers? They can boost conversions by as much as 71% compared to time-based ones. If your triggers aren’t tuned into on-chain data, you’re really leaving some serious retention opportunities on the table. (braze.com)
  • Plus, a little multi-channel orchestration can ramp up two-month retention by as much as 130%--but only when the right event hits the right user at just the right time. If your data ingestion is lagging, you’re missing out on that boost. (braze.com)
• Operational Load: Reorganizing, dealing with duplicate transfers, and managing contract upgrades lead to these “phantom segments.” Marketing ends up wasting impressions, while data teams find themselves burning the midnight oil to clean up the mess.
• Compliance Exposure: Exporting wallet lists and emails as CSVs can create shadow PII stores. Just one audit could raise big red flags about your privacy practices.

7Block’s “Wallet-to-CRM” Pipeline (Technical, Pragmatic, and Procurement-Ready)

We’ve created a smooth, governed connection that takes real-time on-chain events and links them right up to your off-chain marketing systems--no need to completely revamp your existing setup.

1) Identity Layer that Respects Smart Accounts and Privacy

• Authentication: Let’s roll with SIWE (EIP‑4361) and have some backup verification options:
  • Use EIP‑1271 for those contract wallets.
  • Implement ERC‑6492 so folks can authenticate even before their smart account is set up (think counterfactual). (eips.ethereum.org)
• Canonical Identifiers: Normalize every address to CAIP‑10 (like eip155:1:0x...) to dodge any issues with chain/format drift and keep those checksum inconsistencies in check (thanks, EIP‑55). This makes joining across chains and tools super easy! (chainagnostic.org)
• Privacy-Preserving Email Binding (optional): How about using zk‑email? It lets you prove ownership of an email (using DKIM) without exposing any raw email data thanks to zero-knowledge tech. This way, you can offer cool perks based on “email verified” status while keeping everything secure. It impresses security auditors and limits the potential fallout if a breach occurs. (docs.zk.email)

2) Event ingestion that won’t drop packets under load

• Pick a streaming indexer that handles reorgs like a pro and supports webhooks:
  • Alchemy Notify: Keep tabs on up to 100k addresses per webhook for Address Activity and NFT Activity. It covers both internal and token transfers across more than 30 EVM chains, plus Solana's in beta! Check it out here: (alchemy.com).
  • Moralis Streams: This one’s great for wallet and contract events across EVM and major L2s. You’ll get 100% webhook delivery, with features like retries, pause/resume options, and “blocks until confirmed” controls to help minimize reorg churn (we’re talking about 12 blocks on Ethereum). For more details, head over to (docs.moralis.com).
  • QuickNode Webhooks: Perfect if you want easy, no-code filters. It offers automatic reorg handling and compression to keep those payloads light. Learn more at (quicknode.com).
• Need sub-second scale or custom transformations? We’ve got you covered with The Graph Substreams:
  • These Rust modules work their magic by processing blocks in parallel and sending data straight to Kafka/Postgres/Snowflake. Plus, they include cursor-managed reconnection to make sure you don’t miss any events and manage costs effectively with a $/TB model. Dive deeper here: (thegraph.com).

3) Stream Processing and Dedupe Managed by SRE

We create idempotent consumers that handle stream processing and deduplication smoothly, like:

• Confirmation windows: We wait for N blocks and handle compensations during reorgs.
• Per-chain enrichment: This involves decoding ERC‑20/721/1155 transfers, classifying DeFi interactions (like adding/removing liquidity or borrowing/repaying), and normalizing metadata.
• Kafka Streams: We use these to join identity maps (think CAIP‑10 ↔ external_id) and set up TTL caches to make sure we respect CRM rate limits. We typically go for Kafka/Redpanda because they handle backpressure and replay really well. Check it out here: (kafka.apache.org).

4) Warehouse Activation That Won’t Overwhelm Your CRM Limits

• We pull in tailored data into Snowflake/Databricks with our key tables: “wallet_event_fct,” “address_dim,” and “identity_link_dim,” and then activate it to Braze/SFMC via Reverse ETL:
  • Hightouch and Census help sync user objects, cohorts, and events. Both of these tools are great for importing Braze cohorts and making track calls. Think of using cohorts for audience memberships and track calls for “Audience Entered” events. Check out more on braze.com for details!
  • We’re mindful of rate limits when batching requests: you can send up to 75 events/attributes per /users/track request, with a base burst of 3,000 requests every 3 seconds. Our adaptive throttling is smart; it uses Braze’s response headers (X‑RateLimit‑*) to keep everything running smoothly. For more on this, visit braze.com.
  • When it comes to real-time audiences moving from Segment Engage to Braze, we stick with Identify for custom attributes that flag eligibility and Track for custom events that trigger actions in Canvas. You can dive deeper into this on segment-docs.netlify.app.

5) Campaign Orchestration Patterns That Really Boost Retention

• “Mint-to-message” (NFT/asset acquisition):
  • Trigger: When an ERC-721 or ERC-1155 transfer happens to a known wallet in the last 5 minutes (confirmed = true).
  • Action: Depending on whether the user is active, you can either show an in-app tooltip or send a push/SMS with some “how to use” info and an incentive to get them engaged.
  • Guardrails: Make sure to set up frequency caps and deduplication on tokenId so you’re not overwhelming anyone.
• “DeFi health check” (borrower at risk):
  • Trigger: A specific event in the protocol, like when the collateral ratio drops below a set threshold in the Substreams pipeline.
  • Action: Send a transactional push and an email that lays out the steps to rebalance. You could also connect them to an embedded assistant for extra help.
  • Guardrails: Don’t send this if the user has already paid off within the last 24 hours, and keep an eye on the rate-limit monitor to throttle if needed.
• “Bridge completion nudge” (drop-off recovery):
  • Trigger: If there's an outgoing bridge event without a matching incoming one in a set time frame (let’s say X minutes).
  • Action: Send a quick SMS and show an in-app banner that updates them on their progress along with a support link.
• Why It Works: These strategies rely on action-based, cross-channel delivery, which has been shown to be way more effective than just sticking to time-based sends. According to Braze, using these in-the-moment triggers can boost conversions by up to 71%, and their long-term hybrid messaging keeps 30-day retention significantly higher. (braze.com)

6) Compliance, SOC2, and procurement readouts

• Data minimization: We make it a point to steer clear of storing raw PII alongside wallet graphs. When we do need an email, we can verify ownership using zk‑email proofs instead of holding onto the actual address. Check it out here: (docs.zk.email).
• SOC2 posture for embedded wallets: We team up with providers who highlight their SOC2 Type II certification (like Magic, Dynamic, and Privy, which also mentions SOC2 and various audits). This helps us breeze through vendor security questionnaires and cuts down on the legal back and forth. For more details, visit: (magic.link).
• CRM export governance: We’ve ditched CSV flows and now use governed pipelines (think Reverse ETL + Braze cohorts). Plus, we can set up security events to export to S3 for easy audit trails. Here's the link for more info: (braze.com).
• Regionality: To stay compliant with GDPR, CCPA, and CPRA, we’ve got regional sinks, deletion flows tied to external_id/CAIP‑10, and we use deterministic hashing when it makes sense.

Architecture at a Glance

• Capture: We kick things off with Alchemy, Moralis, or QuickNode webhooks or use The Graph Substreams. They send data to an HTTPS endpoint on GCP or AWS, and we make sure everything’s legit with signed payload verification.
• Process: Data flows into Kafka or Redpanda topics for each blockchain, plus we’ve got a dead-letter queue (dlq) in case anything goes sideways. Our enrichment workers sort out token metadata and classify those protocol interactions. When it comes to confirmations, our handler is on it, moving things from “unconfirmed” to “confirmed.”
• Persist: We store everything in Snowflake fact tables while running dbt tests to keep an eye on non-negativity and ensure our surrogate keys are unique.
• Activate: For activation, we use Hightouch and Census to create cohorts in Braze and track user interactions through /users/track. Segment Engage helps us capture real-time audiences for events like “entered” or “exited.”
• Secure: We’ve got security covered with OIDC/OAuth SSO for our ops console, along with a SIEM export and a regional vault for all those sensitive secrets.

NFT Loyalty Onboarding in Just 2 Weeks

• Ingestion: We’re using the Alchemy Address Activity webhook to keep tabs on ERC‑721 transfers for your contract. It can handle up to 100,000 addresses per webhook across more than 30 EVM chains. We’ve set it up with confirmed=true routing and included internal/erc20 categories to trigger cross-selling opportunities. You can check out the details here.
• Identity: We’re implementing SIWE along with EIP‑1271 and ERC‑6492 to allow contract wallets and counterfactual accounts to authenticate easily. Addresses will be normalized using CAIP‑10 for consistency. More info can be found here.
• Activation: Segment Engage will send audience membership info to Braze. This includes both Identify (a custom attribute) and Track (Audience Entered) to kick off a Canvas. You can learn more about the integration here.
• Guardrails: We've set up Braze to batch updates (keeping it to 75 updates per call) and added adaptive throttling using X‑RateLimit headers. There are alarms in place to notify us when a 3-second burst is nearing 80%. Check out the specifics here.
• Expected Lift: Historically, multi-channel onboarding tends to boost 2-month retention by as much as 130% compared to no messages. We’ll run an A/B test on the Canvas to measure the impact. Read more about it here.

DeFi Collateral Protection (Account Abstraction Optional)

• Ingestion: The Substreams module crunches the numbers to compute the health factor for each borrower every block. It sends this data to Kafka with smart cursor management, which means no missed blocks and affordable backfills. Check it out here: (thegraph.com).
• Trigger: When the health factor falls below 1.25, we'll only send alerts once it’s confirmed for a set number of blocks (like, say, 12 on Ethereum). More details can be found here: (docs.moralis.com).
• Action: A Braze transactional email and push notification will go out to users with a “one-click repay” link. If you’re using ERC‑4337 paymasters, we can even sponsor the gas for the corrective transaction for those users who might be at risk. Just a heads up--paymasters require some staking and deterministic validation to keep everything in check, but we’ll make sure to put in the guardrails as per the spec. More info here: (docs.erc4337.io).
• Result: We’ve seen that real-time, action-based campaigns tend to get better conversion rates compared to your typical time-based blasts. During the pilot, we’ll measure how much of a lift you get. For more insights, check this out: (braze.com).

Bridge Drop-Off Recovery with Privacy-First Email Verification

• Identity: Users can verify their email ownership using zk-email, which provides DKIM-verified proof. This allows Braze to send out transactional updates without having to keep the raw email in the wallet graph. Check out more details in the docs.zk.email.
• Trigger: If a bridge out is detected and there’s no matching within 15 minutes, it kicks things into gear.
• Action: Users receive SMS updates and an email with the progress status. Plus, if they're active in the app, they’ll get troubleshooting support right there!

Best Emerging Practices We Implement by Default

• Normalize wallet IDs using CAIP‑10 and add a checksum with EIP‑55. We also keep the chain_id stored separately to prevent any mix-ups. Check it out on chainagnostic.org.
• Treat smart accounts as VIPs: We verify their signatures with EIP‑1271 and accept pre-deploy authorization via ERC‑6492, especially now that EIP‑7702 is in play, giving EOAs some smart features. More info can be found at eips.ethereum.org.
• Reorg-aware triggers: We only promote events after a certain number of confirmations per chain. Tools like Moralis and Alchemy can help us check the confirmation state in their webhooks--definitely a must-use! Learn more on docs.moralis.com.
• Rate-limit guards: We make sure to follow Braze's batch sizes, burst limits, and /users/track headers. When we hit unexpected spikes (like during a popular mint), we buffer in Kafka and handle the situation smoothly. For details, visit braze.com.
• Reverse ETL for governance: Instead of relying on ad-hoc scripts, we use Hightouch or Census to push cohorts/events from Snowflake, keeping in line with security's “no CSVs” rule. More insights can be found at braze.com.
• Vendor security posture: When we need embedded wallets, we look for partners that have SOC2 Type II and independent audits--like Magic, Dynamic, and Privy. You can check their security compliance at magic.link.

Prove it -- what we measure in a 90‑day pilot

Here’s what we’re looking to track during our 90-day pilot:

GTM and retention KPIs we’re all in on:

• Time-to-trigger (from block inclusion to CRM attribute/event): We're aiming for the 50th percentile (p50) to be under 120 seconds, and the 95th percentile (p95) under 5 minutes.
• Event integrity: We’re keeping our eyes on keeping duplicates post-confirmation below 0.5% and orphaned triggers after a reorg under 0.1%.
• CRM reliability: We want 429 status codes (you know, burst throttling) to be under 0.1%, thanks to our dynamic batcher. And we’ll make sure there are zero CSV export issues.

Business outcomes we want to connect via holdouts:

• A lift in 30-day retention for action-based cohorts compared to time-based controls.
• An uptick in conversion rates for strategies like “mint-to-message,” “bridge recovery,” and “DeFi health check.”
• Better paid ad efficiency: we’re looking to cut retargeting costs through smarter suppression lists.

Measurement & Reporting

We’re going to roll out a causal measurement plan that focuses on uplift modeling with some solid guardrails in place. Plus, we’ll ship dashboards using Snowflake and Braze Canvas reporting. If you’re into digging deeper, check out some recent research on uplift targeting frameworks that ensure optimized scaling. You can find it here: arxiv.org.

What you get with 7Block Labs

• A solid Wallet→CRM pipeline that's ready for production. We're talking SLAs, observability, and data contracts--all put together by real engineers who know how to handle Solidity, ZK, and CRM integrations, not just slide decks.
• Documentation that works for procurement: We've got SOC2 alignment, DPIAs, DPA addenda, and secure data flow diagrams, making it easy for your security team to give the green light.
• Teams that bridge the gap: We can fine-tune your Solidity events for better downstream analytics and create the dbt models your lifecycle team is looking for.

Relevant Services

• Looking for a complete solution? Check out our custom blockchain development services and web3 development services for a turnkey build that fits your needs.
• Need a security sign-off or a pre-launch review? Our security audit services have got you covered! We focus on event integrity, reorg handling, and signature verification paths to keep everything in check.
• Want to turn your results into something user-friendly? We specialize in crafting engaging experiences with our dApp development and robust smart contract development. Plus, if you’re diving into loyalty programs or custody solutions, we also offer data-driven asset management platforms.

Implementation Sketch (Node + Serverless)

So, here’s the plan to get everything rolling:

• First off, we’ll set up a webhook using Alchemy, Moralis, or QuickNode. Once that’s in place, we’ll verify the signature, parse the logs, and send everything over to the wallet_events_raw Kafka topic.

Consumer Service

• Next up, our consumer service will:
  • Enrich the incoming data with token metadata, map it to CAIP‑10, and create a deduplication key using the format tx_hash|log_index|chain.
  • Hold this data in a confirmation buffer until it's confirmed, at which point we’ll emit the wallet_events_curated.
  • Upsert the data into Snowflake tables through streaming ingest and kick off a Hightouch run for the affected cohorts.

Reverse ETL Job

• For our reverse ETL job, we’ll handle:
  • “Eligibility” flags by using Braze Identify to set some custom attributes.
  • “Entered” events with Braze Track for tracking custom events.
  • We’ll keep our batches to a max of 75 and use adaptive throttling based on the X‑RateLimit headers to stay efficient.

Canvas

• Lastly, we’ll branch out based on channel availability:
  • If the app is active, we’ll shoot for in-app notifications; if not, we’ll go with push notifications, SMS, or email. We’ll also implement suppression windows to help avoid notification fatigue.

Why Now

• Thanks to ERC‑4337, EIP‑7702, and the rise of modern embedded wallets, using these tools is smoother than ever. With the right paymasters in place, you can easily sponsor actions like repayments and create “one-click” retention loops. The tooling and standards have really come a long way through 2025--it's all about execution now, not just research and development. Check it out here: (docs.erc4337.io)

Final Word

Your CRM is already set to boost retention when it receives the right signals at just the right moment. Our task is to connect the chain state to that signal--making sure it’s spot on, secure, and within API limits--so that marketing can celebrate its successes while security can rest easy.

CTA: Schedule Your 90-Day Pilot Strategy Call

Ready to take the next step? Let’s chat about your strategy with a 90-day pilot call! Just click through to book your session.