To my understanding, KYC simply means "Know your customer". Investors(customers) who participate in ICO are made to go through KYC process before they are even allowed to purchase their tokens. On the other hand, Bounty hunters are just "part time workers" of the project and not customers. Even if they will be made to go through a KYC process, it should be before they start working and not after. Waiting for them to finish working for the project and refusing to pay them because they failed to pass KYC afterwards is a total cheat.
The KYC passage must undoubtedly be marked at the very beginning, and not after the work on the bounty company is completed, by bounty hunters.
If the opposite happens, then something is wrong and you need to think about how to proceed.