I usually look for bounty not by trustable criteria, but by looking at the amount of fund allocation for bounty, the concept of project, and the development team, as well as the advisors.
I don't think most of the bounty campaign is managed honesly by the one who managed it. In my personal experience with previous bounty campaigns the token allocations wasn't followed, and worst was we've been cheated. So other people thought that this thing was a waste of time rather than earning passive income through other trading jobs to become passive income.