I am very surprised that there aren't several add ons already available for advertising. google is a gajillion dollar company and most people want their communities to generate passive income from advertising from adwords and/or other similar ad providers. I want to build a membership site but I cannot sell subscriptions my biz model will only make money from ad clicks and/or ad views. I'm truly shocked that Boonex expects people to pay $1000 for the license but doesn't provide them with a turn-key see more advertising option.
Someone should build a banner ad and google adwords ready template or add-on or code available for sale. I don't have the skills to do it but I'm shocked there isn't one - or if there is one, it sure isn't that is easy to find.
This idea is also a good one - let people submit their own ads and pay for the time or number of views or number of clicks. No reason why the software can't do both - plug in a paid-for ad and fill the spot (or alternate) with a Google Adwords banner/text ad when a member-advertiser isn't available to fill the spots.
Someone should do it or make it available or if it is available make it easier to find!