MarginFi is a leading DeFi lending and borrowing protocol on Solana. You can lend tokens to earn a yield. You can pay interest to borrow tokens, and if you do either of these activities, you'll accrue points for MarginFi's airdrop.
Here is a referral link: https://www.mfi.gg/refer/bd2506d9-5afd-4e9d-8490-bd0c1f657757