I can say 100% that 60% of all bounty is a Scam. The reward for them is either given and the tokens will lie on your wallet forever or do not give at all. Then what's the point of doing this ?
Not 60% i would rather give out 80% of them are total scam. Not directly to be showed but basing on the after results you would really able to identify out that most projects doesnt really have any sense. If you are asking on whats the point on doing this? then we do know this is one of the way on making profits thru this kind of investment and risk factor cant really be avoided on these scenarios and therefore if you dont like to lose up money or end up on holding a shitcoin then its your choice not to invest or risk at all.
Most of the bounty projects are just making something that doesn't makes sense after all but i would say some of them are making something that has some usefulness but lack of team development and most of them that has a good project are seems to be too greedy and scammers. I wonder why can't they just have to stick to the plan and proceed to continue their project and see the outcome instead of taking a different way.