How does this idea sound? ...
I have an Article Submission Module on my website and website members can publish articles they have written on the websites subjects. What I plan to offer as an incentive is to let them take 50% of the ad revenue of that page.
So I would just use a rotating banner on that page with 1st banner = my ad i.e. google adsense with my ID and the 2nd banner has the Authors/Members Ad i.e. google adsense with their ID.
I take it that Google allows people to have their ad placed on other websites like mine. Has anyone tried this sort of system?