Most of the time they do uncover or do know things when the project is already on the concluding phase when theres no time for you to go back or you already have done the works until you realize that you are dealing with the wrong or fake devs.
Sadly they dont learn and repeat the same mistake. The mindset that bounty hunting is a easy way to make free money is a wrong one because there is no such thing as free money.
Scams now do become conservative and comes too realistic even how careful you are on making up some search but this doesnt guarantee you out on not to step to these fake or fraud ones.
Like I have said, it is a cat and mouse game. You catch one and another one will appear. They scam and make money from these scams so they continue doing so ripping bounty hunters and investors.
Just stick with some basic rules on identifying things like legit dev and some realistic project goal compared to those who do keep telling almost impossible things.Ive encountered it for how many times and these projects are destined to fail.
It is easier to conclude that these projects are all going to be failures. No use hunting behind them and no use trying to find a pin in a haystack. The days of ICOs being big are long gone and it has been 3years where no such coin has risen to come close to bitcoin.