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 ?
that is the risk that must be received in participating in the bounty because there are indeed many scam ICO this time. in fact you can avoid that before you participate, namely checking all project details and checking the ICO developments everyday through their telegram channels.