from their website: "Hold your cryptocurrencies and put them to work at the same time. Cake is the first fully transparent platform that generates constant cash flow for you".
At the moment, you can get a bonus of $30 in $DFI ($20 for signing up+ $10 if you use a referral code) when you register on CakeDeFi´s website and fully verify your account. you will need to make a deposit to get the bonus which can be as small as 1 Satoshi (0.00032597 USD) which is nothing. I deposited $10 USDT and got the bonus immediately.
Bonus will be locked up and staked for 180 days which will automatically yields staking returns during this time (37% APY). These staking rewards will be added on top of the bonus and can be withdrawn after the lock-up period has ended.
your deposit is NOT locked up and you can withdraw anytime.
you will get interest on your crypto up to 37% APY (USDT is 8%), in addition, you can add BTC/ETH/USDT into their liquidity pool and earn up to 241% API on your crypto.