Some people will disagree with you on this. I for one. I participated in the AMZ bounty managed by Bounty Detective. But the whole thing was reorganised by the AMZ team after bounty was over as they started asking for KYC. I refused to submit my KYC because I smelt something fishy. The team burnt my 3771 tokens. BD was helpless and couldn't do anything on that. If BD had escrowed the rewards all that wouldn't have happened because my conclusion is that AMZ never wanted to pay participants from the beginning. Otherwise why distribute and then lock the tokens up on their site in the first place when it wasn't originally in the bounty OP? So, I don't think BD is exceptional when it comes to the escrow thing.