For example, let’s say Alice has 20 zs-REETH staked that are worth 22 ETH in total value. She trades 10,000 USDC for 10,005 USDT using the integrated exchange and is calculated to have spent 4.54 ETH equivalent (when ETH is worth 2,200 USDC). She has staked for over 3 months and is eligible to receive cashback up to 45% of staked ETH value, which is 9.9 ETH; however she has only spent 4.54 ETH equivalent. She can claim 4% of her ETH spent due to staking more than 10 ETH equivalent, which is 0.1816 ETH. This is her maximum claimable amount. The protocol will mint REETH to the user, worth 0.1816 ETH. Claiming zs-REETH rewards will also add to the ETH spent balance.