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Deblock is the first bank account fully integrated with a crypto wallet, giving users the freedom to move between euros and crypto in real time. The team is highly experimental and looks for channels that can expand revenue and optimize cost per acquisition.
Alongside their UA efforts, Deblock saw retargeting as a scalable way to bring back dormant users and uplift value from users already acquired. The goal was to improve efficiency, increase downstream actions, and build a repeatable growth engine they could later pair with UA.
Users who wanted traditional banking services but had no interest in crypto.
Users willing to try small crypto purchases but who often churned after a few low-value transactions.
A concentrated segment of users with frequent crypto activity and significantly higher lifetime value compared to the broader base.
Target: Users who viewed the wallet or onboarding steps but never completed the core actions.
Execution highlights:
Target: Users who already explored the crypto purchase flow or card activation path
Execution highlights:

RZR's privacy-first bidding models and SKAN-friendly optimization let the campaigns scale efficiently without compromising user data or Deblock’s trust standards. This ensured every retargeting decision aligned with the client’s privacy requirements while still delivering below-target CPA.
Deblock needed clarity, trust, and visual guidance for a crypto-newcomer audience. RZR provided end-to-end creative development, producing the bonus explainers, wallet steps, and 3D animations that drove consistent performance on both iOS and Android.
Hitting below-target CPA on both iOS and Android wasn’t accidental. Daily pacing, audience refresh cycles, and timely creative swaps drove meaningful efficiency gains.
This wasn't only about beating a CPA target. It's shows that retargeting is a high-leverage growth lever for fintech apps with hybrid banking and crypto value props.
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