Joomlaya

Joomlaya is a Joomla!/Mambo Download Portal.

For articles you contribute, your AdSense ID will be used 75% of the time when displaying the full article. There is also a chance that your AdSense ID will be used when you comment on the articles.

For forums postings in the single post view, your Adsense ID will be used 75% of the time for posts submitted by you. In thread view, your AdSense ID will be used some percentage of time when you have posts in the thread. The exact formula for calculating the ad showing percentages is not, and will not be, disclosed. Rest assured, more than 75% of the ad show times are dedicated posters in the thread.

See: http://www.joomlaya.com/index.php?option=com_content&task=view&id=94&Itemid=52