The risks for both protocols, Compound and Aave, and perhaps other DeFi lenders, are similar: Airdrop speculators could suction up ETH deposits thereby creating liquidity constraints for other users. Indeed, other DeFi protocols are seeing users swap out ETH-derivatives, like Lido’s staked ETH (stETH), which won’t receive airdrops and is now trading at a significant discount, for ETH, which will.
Source: https://www.coindesk.com/layer2/2022/09/08/why-defi-protocols-are-limiting-eth-borrowing-ahead-of-ethereums-merge/?utm_medium=referral&utm_source=rss&utm_campaign=headlines