Don't compare campaign managers (manages signature campagins with really high quality posts from the enrolled users) with bounty managers (manages bounty campaigns where the enrolled users share advertisements on social media sites and only comes to this forum to give a weekly update about their weekly 'job' and waiting for the bounty...) Of course, there are some kind of bounties where you have to spam this forum to get the bounty (post as many shitposts as possible...) in order to get the bounty, so the real problem here is the bounty part of the forum where the managers just don't care about quality but only quantity (the more the merrier ) to advertise their (usually) shitcoin or anything they give out as a bounty...
As long as the bounty managers are not forced to pay for the quality posts only, there will be little chance for the forum to get rid of the spam and the shitposts... but unfortunately there's no universal solution for this...