Now this problem has almost disappeared. Rarely are projects requiring KYC. But until a few years ago, this really was a problem for bounty hunters. The project teams demanded KYC mainly after the end of the bounty, and after a certain long time, when many had already ceased to be interested in this project. Thus, some of the bounty hunters did not know about such a requirement and, therefore, in the end, did not receive the earned tokens.
It should be said that KYC is completely illegal for bounty hunters. It should be carried out exclusively for the prevention of dirty money laundering and combating the financing of terrorism.