Nowadays, theres a lot of scams and its really hard to detect which is legit and not. And eventhough we do on searching about the team behind the project, their social media, whitepaper and project, the truth is there is no 100% assurance that these bounties are not a scam. Mostly all Devs/teams of ico are active during ico but after the ico, they turned out to be silent or scams....But whatever the turn-out, we need to accept and goes on. After all, we dont invest cash fund so I just move on and accept the fact and try again another bounty.