Bounty manager should declare if before the bounty starts so that bounty hunters will have an option on joining the said campaign or not. For me, asking KYC when they bounty campaign is over is not fair on the bounty hunter's side.
Quite right. There should be an "I agree to KYC" option when joining the bounty. That way the hunter can choose for himself. In truth the ICOs ARE getting free promotion but still reserve the right to know who they are paying out with their tokens. This is actually more in the realm of "Know your Supplier" and deserves complete transparency.