Nowadays, I notice most of bounties have strick rules, making bounties more organize and I like that Bounty Manager requesting Proof of Authentication to limit scammer .
It's been one of major mistakes of bounty hunter like me not to read rules and requirements of each bounties ending up not getting stakes so it's very important to read and understand each rules to ensure that we're doing the right thing and not wasting our time and effort.
I think bounty rules should be a little more stricter to prevent spammers from ever joining multiple accounts in the bounty. To be honest, bounty campaigns nowadays let these things happen. Good thing some campaigns have KYC. This significantly reduces multiple account users.