first off all you are now Jr member. its not good rank for joining signature bounty campaign. Signature bounty is now hard to find out.why? because daily a lot of campaign coming in this forum and we cant find out suitable bounty program.also a lot of scam/fake bounty announced now a days.so why legit good bounty are rare now a days.
Hmm... you are right. I have seen threads here which accuse ICOs such as Impressio and Uchit to be scams. And they have been flagged as scams by some of the ICO review sites as well. I feel sorry for those users who participated in their bounty campaigns. All of their effort has been wasted.
Perhaps the good criteria of each person will vary. Choosing good one from the team of the project. Good team will make good project and development. but that obviously became bounty that has very soft cap ICO are required in order to get results. This will be a reference if it will receive a fee or not.