I'm stunned by your finding this time, it's pretty much YOSHIE. Just curious, how much time did you spend to find them ? LOL

In my opinion, there is no way to stop bounty cheat like this because the average guilty account is a rank newbie. They can easily leave their account and create another account by changing their Twitter, Telegram, and other usernames and returning to the campaign with a new account. This cycle will never stop, hopefully there will be many change in the future to prevent alt and alt cheating in social media bounty. POA also doesn't help much, cheater are really clever at hiding.

But, I think you should also notify the Manager of this finding.