I believe that KYC verification is must have. Because this, in the first place, is directed to the struggle with multi-accounts and thus is beneficial to honest bounty-hunters. Count how much you get for your "stakes", If you take part in the bounty company with 100 people. And how much do you get for the same stacks, if 1000 people take part in the company? x10 times less!
This will also improve the efficiency of the bounty-company's. That will affect the success of the token-sale. That will also affect your profit. Think about it!
If anonymity is important to you, then the bounty companies are unlikely to suit you.