I think one should look for project that are already on exchanges and are offering bounties or look for a project that is outstanding. So far the only bounty that scammed me was Temtum.
Lately I have been doing Bounties on KuCoinPlay. They have the advantage of not only having an automated reporting system but also you know every Bounty you get you will be able to monetise since every coin they do is already trading on KuCoin Exchange. It is nice to know that your efforts will produce a reward.
Interesting didn't know about this, Thanks for sharing. Although competition to be in top 550 will be tough. Does it requires users to go through KYC to participate?