Adsense revenue sharing is one type of adsense programs for the forum to share all the advertisement with their member, means all the advertisement revenue can be shared between active members of this forum.
The forum displays advertisement at the page when viewing a thread, forum can use Google AdSense to automatically serve relevant ads for the content on the page. Google pays AdSense publishers on a per click basis as well as per impression.
If a user has an AdSense account, they have the ability to credit their account with the ads served on threads they start or participate in. So, active member can earn some addition revenue fom this which benefit for both party.
Hereby, showing a list of adsense revenue sharing forum as per below