How can we know about scam projects, we are bounty Hunters so for payments kyc mandatory.
To know whether it is a good or scam crypto project, you must do complex research. Look at the legality of the project, how the track record of each the team members, analyze the whitepaper in detail, check their social media channels, or learn every part of their site. It shouldn't be easy, but you need to do it if you want to ensure to join the right project.
Regarding the KYC procedure, not all bounties require KYC to claim the reward. You just need to join the bounty which doesn't command for KYC procedure. While for the bounties which ask you to do KYC, you need to be selective if you still want to join. Choose the most trusted one!