Those ad units do more than make you money.
Torched From the Adsense Program (and Liberated from Pay Per Click Advertising)
Update, 23/01/2013: After submitting an appeal, Adsense re-enabled ad serving to this site. I'm not sure if I'm going to put the ads back up, please read this article and tell me your opinion in the comments below. I received the proverbial pink slip from Google's Adsense program a few days ago. They notified me [...]