1. Asking for kyc as a requirements for payment of tokens to hunters, when that wasnt mention at first during commencing of bounty campaign.
There is always that bounty rule which states that the team can always change or modify the rules when they see fit. So that probably give them the right to add more conditions such as KYC.
I disagree with you on this one, you cannot come out and change rules while campaign must have been completed, you can either change before campaign starts or during campaign not when campaign must have lead to success of project and ended then you begin to see flops in campaign coming out to ask for kyc, if you state option for kyc only those willing to share kyc details with you will perform in such campaign.
Now you mean to say you compelling all hunters to pass kyc or forfeit thier token, making them doing free jobs for you.