I asked this question of DP's Web Dude and he referred me to this forum so here goes: If forum posters earn revenue from Adsense through the forum, then according to the Adsense ToS, they are *not* allowed to click on any Adsense ads that appear on the forum, correct? If so, then who clicks and how are the revenue sharees informed they are not supposed to click "on their own ads"
You can't click your own ad... check the bottom: http://forums.digitalpoint.com/faq.php?faq=revenue_sharing#faq_missing_adsense_id