Change in Page Rank
As expected, this blog has been penalized for selling text link ads, this is a gift you expect every year. In 2008, almost all my websites were deindexed for selling text links. In 2009, the page rank of most websites dropped to zero as a penalty. If you use Google Adsense, your account can be disabled at any time, without any valid reason. When you sell text link ads, this is the risk you take and you have to make provisions accordingly.