How we can anticipate this matter? How the hunters be protected by the managers or they are just a toy to promote the project and yet the team doesn't want to pay as they are already in success?
This can be done only through escrow but the question is whether the developer wanna escrowing the reward or not. So many developers didn't lose control over the fund for the bounty.
The multi signature wallet can also be a solution for this problem but i think escrow must become a new standard in managing the bounty.
That's why joining in bounty it just like a high risk decision. Sometimes you won't get pair for your effort.