Credit:
It's not just Yahoo that wants to share revenue with users: the social bookmarking site Simpy is having a go too. From the Simpy blog earlier this month:
Simpy has support for Google AdSense as a third party. Each Simpy member has his/her main page on Simpy (e.g. http://www.simpy.com/user/otis ). Every Simpy member can now enter his/her Google AdSense Id into Simpy, and his/her page will immediately start showing ads with his/her Id. All earnings from such ads go to members, as their Ids are used to display ads. The same may soon start happening on the search results page, and on the user profile page, once that is ready. Your page, your data, your ads, your money.