The success of a bounty project is not in the hand of a bounty manager, the ball is in your courts, you are responsible for the bounty projects you choose, if they fail it's never bounty managers fault. Always remember this.
I believe every bounty hunters know very much about this except for the newbies. Everyone certainly has some responsibility to own up and the failure of a project shouldn't be blame on the manager unless if the manager is part of the team. Everyone hunter needs to do personal research before joining any campaign and also have it at the back of his/her mind that not all projects will pay up
If the bounty hunter is really smart, he will just follow all the reputable BMs here handling bitcoin paying campaigns. Because most projects in bounties section paying their respective tokens or coins have no assurance of getting paid on time and if they will ever reach in exchanges. So whatever you choose as a hunter has nothing to do with the BM. They can only do so much to protect their participants but the last call is still on the project team.