MetaMask, Linea, and Brevis have teamed up to launch a rewards program designed to make earning in decentralized finance simple and transparent. Starting August 13 at 9:00 a.m. EST, MetaMask Card holders who have completed at least one transaction can earn a fixed 2.4% APR by lending or borrowing USDC on Aave’s Linea market.
The program runs entirely on-chain through Incentra, a platform powered by Brevis’s zero-knowledge proof technology. Users do not need to sign up, add extra liquidity, or complete extra steps. Once eligible, rewards are automatically calculated in four-hour cycles and can be claimed directly through Incentra. Positions up to a combined total of 5,000 USDC qualify.
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MetaMask and Linea have established their brands around promoting privacy, control for users, and Web3 transparency. Many of the reward systems in crypto have not had those virtues, depending on central tracking, ambiguous terms, or complex onboarding criteria.
This partnership eliminates those hurdles. All reward computations are posted straight on-chain, so everybody can confirm payments. Users won’t need to change positions or execute secret actions. Rather, the campaign engages with what they already possess. It’s a simple model that looks to establish a new standard across the industry for verifiable rewards.
Brevis’s zero-knowledge proof system ensures that rewards are both accurate and secure. Every four hours, it measures the time-weighted average balance of each eligible user’s lending and borrowing positions in Aave’s USDC market on Linea.

A proof is then generated to confirm three things: the user meets the eligibility rules, they had an active qualifying position during the cycle, and the reward amount matches data from Aave’s on-chain records. Incentra’s smart contract on Linea verifies these proofs without relying on any centralized service, ensuring the process remains trustless from start to finish.
By teaming up with MetaMask and Linea, Brevis makes a significant step towards demonstrating that its infrastructure can scale with big Web3 players. The approach can be scaled out to support multiple chains and protocols, allowing individuals to be rewarded from multiple markets transparently and with proof of reward.
This campaign offers more than just a yield boost; it presents a blueprint for a new way of running rewards in decentralized finance. For MetaMask Card users, the path to earning starts with simply lending or borrowing USDC on Aave’s Linea market. Rewards are live and ready to claim through Incentra.
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