I've read numerious threads suggesting ways to reduce and control spam in the forum. Many of them include really good creative ideas, but unfortuntely they seem to suffer from a couple of drawbacks. One major disadvantage is that some of them require increased work for moderators, or increased costs for the forum. The ones that suggest major policy shifts such as the banning of bounty programmes, could result in a loss of income for the forum. I propose that the responsible bounty managers are given a tool to evaluate the results of the posting habits of their affiliates.
My suggestion is that managers use a reference link to check the activity generated by signatures. Many affiliates are low value spammers, and are frequently put on ignore by many members. Their posts are less likely to generate quality traffic than the signatures of more responsible members. A unique pseudo-directory can provide such a link. Obviously this will be a temptation to dishonest affiliates to attempt to cheat the manager, but this is not too difficult to detect, and can help to discover fraudulent and cheating affiliates.
Your suggestions is really on point because truth be told, there are some people who wear signature, make posts and when one come across such you wonder if they are being paid for such post but with your suggestions, it still boils down to the manager handling the campaign. We all know that there are some managers that when they manage a campaign, they are strict to a faulty point with little or no room for leniency those are the ones that would go extra miles to ensure quality by implementing any method suggested to make the forum better place.
But the other category of managers are the ones causing the whole issue, they go ahead and launch a campaign with unlimited number of participants, they don't monitor and that is the bane of the community and these are the people that would either not implement your suggestions or frustrate it. Until these issue if managers is settled, every suggestions are short term.