We researched it for our yield farm, in the position where we will continuously research new protocols for users who deposited tokens in our dApp, but you can do the same work by yourself. If you do it by yourself, you just need to monitor protocol APY, and you will get a successful profit.
Ive seen a lot of protocol too but this always end up being low and sometime failed due to the existing fact that apy cant be consistent due to massive users base. There are some who thought and create a way to rebalance this but Im not sure if they have been succesful on pulling off the idea for it. Somehow, its really sounds like a ponzi scheme and those who enter first will deifnitely ripped all the high gains. You have said it well, this is the major problem with all these platforms offering different apy for lending or staking. Consistency is always a problem, most of them always have difficulties continue paying their users and sometimes if not most times, the apy is reduced and users will be disappointed. Imo, it is better to operate with platform with a fixed apy, that way you already know what to expect.
. We spend months researching all possible hacks and vulnerabilities in smart contract protocols, then designing them in a way that prevents anyone from stealing users' money, multiples times reviewing each line of code and cannot normally sleep while thinking what else can be done to save users which will trust us. 
. And now you are saying that because of FTX, our project is also bad!
