Maybe some people are shy about posting their ads because they don't look good or they don't know how to make one, and while they could get the + membership, they can't afford having an artist improve their ads?
I know we have an art section, but that can be particularly intimidating for somebody to post programmer art for feedback and try to learn to make art just for a banner, and it's against the rules to ask for free art there (they'd have to post in the classifieds, which is far more hubbub than I can think most people would want to go through).
How about a dedicated thread where non-artists who have a + membership can post what they're looking for, for a gamedev.net ad, and the artists among us can whip up something workable when we're able?
Probably nothing really slick like of couple of the more beautiful examples on rotation now, but something respectable.
Thoughts? Would this be acceptable? Would anybody be encouraged to get a + membership and put up an ad if they had help in the graphics department?
And if it's a thread in the art section (as an exception to the rules), artists might be encouraged by a few upvotes too. Win-win-win.