NOw that yahoo is comming up with its own as publishing network its time that google says bye to its monopoly on content ads networks. It is assumed that yahoo ads will have much more returns in comparison to the google adsense, around 25% higher, Based on comments noticed by current yahoo and google ad publishers.
Also the Google adsense programs dont have a very good way of managing there publisher and kick off the valid publishers also adding up to the frustration of publishers. where i personally think yahoo would be better. This fact is adding up and more and more publishers are looking at moving to yahoo ads over time.
Although Yahoo ads are in BETA but they are going to hit the market good and on time when the boom is going to be there.
Yahoo Ads Recommended for Content Ads Publishers.