Those who have paid attention (yeah, all three of you) to what I think about RSS feeds with advertising in them, know that I've been saying that people will dump the feeds once it starts to bug them since forever, and proclaim so loud and clear in that e-book Unleash the power of RSS. RSS feeds are ads most of the time. It's usually headline + link, or headline + lead-in + link - in effect "advertising" whats new on site X. Some sites spend everything they have in their feeds, their entire post and images - these are the ones most likely to do RSS-ads.

Read more about Adsense RSS feeds at http://ad-rag.com/124762.php.