KYC has nothing to do with the amount of reward received for joining a bounty program.
of course it does matter because afaik kyc is commonly done on bigger transaction like for example if you are withdrawing a huge amount of cash and if you are an investor of an ico but kyc on an airdrop and on a bounty is not usual anymore .
KYC is for verification purposes and other legal matters that the project may need to deal with. This is why bounty hunters must do thorough research into the program before joining the bounty in order to know the potentials and capabilities of the project hitting the jackpot.
but i still dont get the connection of a kyc with a bounty or maybe you are trying to say that kyc related bounties are more legit than a bounty that does not require a kyc ?