Bounty participants also have many responsibilities before joining any bounty. They join the bounties of such newbie accounts without any research. As a result, after the bounty, they delay the bounty payment with various excuses or do not pay the participants at all. And all those bounty hunters are found who don't get paid and don't care about anything, they join another new bounty campaign. So the devas of the project started making excuses about not paying even after the end of the campaign.