YieldBuild - 6:39 pm on Jun 2, 2009 (gmt 0)

We see Microsoft Content Ads (Pub Center) doing better than YPN. Especially since you can place PubCenter on pages with AdSense.

Our suggestion with sites that have long content pages is to place about 5 ads on a page. Try two or three adsense ads and two or three pubcenter. In most cases we see a substantial increase in overall earnings.