Hunters will make no mistake here, as they are required to work to get what they deserve. And the hunters are still on the job, but they won't know that the project they're working on is a scam, they don't realize it until the end of the campaign. The big mistake here is on that project, but there's nothing we can do about it when they cheat bounty, and in this space such projects and I've never seen the hunter's fault or the BM.
Even the bounty manager has a hard time finding out if the campaign he managed is legitimate or not so they are also working the same as hunters for reviewing a project before they manage it. they can also do mistake managing one scam campaign so you should not blame any one if they participate in scam campaign they are just hoping to get good rewards in it.