and vice versa - forum members can find best offer of signature campaigns.
This is a basic idea, of course there will be some additional features - like filtering by price, time, automated payments etc.
If you want to try your idea, go ahead and build a website for this purpose.
Besides, who's going to maintain the list and check to make sure either the participants are not spammers or the campaign is bogus.
For now, I'm happy with how signature manager maintains both of my point above, hence no reason to move it to a whole new websites.
I'm already contented in here so not gonna jump in to something new.