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It is not easy for Bounty managers to predict scam. It is better to talk to Bounty manager ad make a solution by which you can contact team of ICO , if it is scam then take help of bounty manager and raise voice against ICO team.
Yes, I always try to justify them, because they are not perfect also, and they can make mistakes, just like we can, so sometimes even Bounty Managers get scammed.