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.
It is true that 80% of the results are zero or not successful bounty.
Among the obstacles there are those that do not enter the Exchange, Softcap is not fulfilled and there are also SCAM ICOs.
In that case you need to be careful joining to any ico project bevause most of them are not give a real product you in other words you waste your time byjoining them, always check the white paper and team profile.