There seem to be many new defis that have potential airdrops in the future just for participating. I have tried one called kinza finanace in BSC chain, it gave points on amount of coin you staked or provided liquidity and also through referral activity. The cumulative point would decide the amount of airdrop for each users in the future. The point contest is still running and kinza I believe is also featured in binance. Another similar defi but in Solana blockchain is kamino, they also have points that would determine the coin airdropped. And there are launchpools like tonup where you get new coins for just staking the up coin. Not sure if it's a feature or early promotion.