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