6M on-chain transactions in one quarter.

The campaign.

Coinbase Quest, Aleo, and ZKPuzzle co-designed an integrated learn-and-earn flow that ran for one quarter — CBQ Phase 1B. The flow took a Coinbase exchange user from "I’ve heard of zero-knowledge" to "I’m playing Mystery City in the ZKPuzzle Arcade and earning ALEO."

Each step was a real on-chain action, verifiable on Aleo’s public chain. Each partner brought what the others couldn’t. Coinbase brought the exchange user-base and the trusted educational surface. Aleo brought the privacy-chain infrastructure. ZKPuzzle brought the consumer app where users actually play.

The funnel.

One campaign, five sequential steps from sign-up to recurring subscriber. We’re publishing the post-fraud-cleanup numbers — the more honest version. Most operators report top-of-funnel reach and call it user count.

The fraud cleanup that became infrastructure.

Of 600K+ sign-ups, roughly half turned out to be fraudulent — primarily Brazil-based actors exploiting renewal-cycle and refund mechanics. We patched the holes (~10 consecutive days of zero fraud by the end), reconciled the financial impact (~$10K in dispute fees, ~2M ALEO budget variance), and emerged with 300K+ verified humans and 43K real all-time Pro subscribers.

What started as a fire-fight became durable infrastructure. The multi-variety risk monitoring stack and the ZK proof-of-human checkpoints we built to clean this campaign are now standard on every campaign we run — designed so legitimate users don’t feel friction while bad actors hit walls. Zero-knowledge proofs verify humanness without collecting personal data; behavioral, on-chain, and device signals do the heavy lifting in the background.

We’re publishing this because every consumer-scale campaign has this story — most operators bury it. The underlying campaign economics work whether the fraud number is 0 or 50K, and partners evaluating us deserve the full picture.

The playbook, now.

What this campaign taught us is what we now offer every partner.

• Exchange-side learn-and-earn. Educational quests on the partner’s surface — Coinbase, or any major exchange.
• Account abstraction on-ramp. Wallet creation without private-key handoff. The user just plays.
• Consumer-app engagement. Mystery City and the ZKPuzzle Arcade — actual ZK gameplay, not claim-and-leave.
• Multi-variety risk monitoring. Behavioral + on-chain + device signals streamed continuously. Anomalies flagged in real time.
• ZK proof-of-human checkpoints. Zero-knowledge proofs at sign-up, before payouts, before subscription actions. Invisible to real users; hard wall for sybils.
• On-chain settlement. Rewards distributed via tokens — verifiable attribution from quest start to wallet to in-app action.