If I can't find a bounty project that's already listed and trading I'm done joining bounties.
No matter how reasonable a project might be if the teams decided to stay anonymous I will pass by
Whitepapers and roadmaps aren't enough anymore,developers should be ready to face the public and be ready to show me they are ready to work ,not experimental on 'it might became success or failure .
Well, in that case, I would rather advise that you should part take on the weekly campaigns, there, not all of your time will going to be wasted, if they didn't pay you on time or not pay at all, then just leave. There is a much more freedom and assurance that you can earn. But don't expect really much about it.