It always belongs to the Bounty campaign that you participate in. The most signature campaigns don't have a KYC requirement for the participants. But I also know some campaigns where it is required to do a KYC. But that no problem for me, it protects the projects against multi account users.
Yes, we can say that it is for the person who have multiple account in same campaign but how about the personal identity of the person? What if there are something happen because they gave their info? But it is good that it is the plan because we can catch all members that has multiple accounts in this forum.
It's not big deal for them as long as the account is promoting the project even it's a sub account, We all know that they created bounty for promoting the project. They implemented a bounty campaign, then they should know and expected on this but there is a hole on multiple account user. You can borrow your valid ID of your family or friends and send it there, maybe there's a risk on sending others for the verification of KYC but it's 85-95% chance that you'll still get the bounty right? That's why it's better to remove KYC for the bounty hunters, they should find another way to promote the project.
And btw, this case should be handled in this forum or solved by the bounty managers to avoid this kind of case.