Most bounty hunters hardly know the purpose of putting on a campaigns signature,i must confess, what's advertisement,when the advertiser isn't one to pay attention to..
Who in his right senses would click a link below a one line spam reply,its basically simply, if one comes up with more quality posts,the better for the campaign..And the more the willingness for users to try out the link on their signatures..

If the managers can take their time to sort this out, really it'll not only be better for the forum,but also for their projects/campaigns