There's gotta be like a dozen signature bounty campaigns going on in the services board right now. (I didn't actually count them.) The way I handle it is to just ignore the topics I don't care about and that way I can focus on the topics I think are interesting. The forum gets more customized to what you're into when you ignore stuff you don't want to see.
I am not sure you get the point of the OP, I think the idea behind the whole post is about exposure and not having certain threads washed up too easily as, bumping a thread plays by a specific set of rules which respect you from unnecessary bumps within a period.
While, you could as well expect signature campaign applicants to keep up with the bumps on Open slots with signature campaigns as well as, bumping some respected managers services.
One thing to note anyway is that,
These bumps on these campaigns are by means of payment notifications, slot announcement/applications and discussion on certain vital changes.
If you’re phenomenal enough, you can have your service bumped once in a while by users and fans alike as well, as much as you would yourself. The difficulty in this is that, it doesn’t give much room for new service providers.
If a new board that distinguishes campaigns from services is needed, I can’t say for sure.