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.
2. Delayed bounty payment to hunters, irrespective of the fact that project was successful.
Reasons usually provided are current market condition and price stability. I do not really mind if my rewards are delayed as long as by the time it's released, the price is relatively higher than ICO (If not, then atleast close to that).
3. Bounty pool slatch for reason best know to them
I think this is only done when the number of participants is less than the minimum required and that is just fair for me. It is usually stated in the rules also.