KYC is good because it can prevent people from using multiple accounts and bots but there is a bad side about requiring KYC in bounty. what if the bounty is a scam? they will sell your info and you won't know that your info is already been used in illegal activities. there are also bounty campaign that don't require KYC at the beginning but at the end of the campaign they change and require it.
In fact KYC is done on their platform. If you really want to find bounty cheaters, KYC bounty participants should only end in the hands of the bounty manager or many other ways that can be done without using the KYC system.
Also, KYC is not necessary if their fundraising involves people outside their country because their services will not be enforced throughout the world.