BuddyPress.org

Ever thought about this plugin?
http://www.oiopublisher.com/

It’s something like USD50 and really easy to set up and skin. Comes as a WP plugin, so will work just as well with BP. As far as I remember all you need to do is include the call to the ads wherever you want them to show up.

Btw, I’m not affiliated with this plugin, just a user of it…