AdSense will stop serving feed adds on December 3.

AdSense for feeds is going away. AdSense will stop serving feed ads on December 3.

AdSense for feeds (AFF)

AdSense for feeds is going away

After carefully evaluating the product, we�ve decided to retire the AdSense for feeds product.

The process will happen in two phases and your account will be affected, depending on your usage of the product. To check whether you�re currently generating any revenue from AdSense for feeds, run your �Products� performance report and review the listed products for recent data for "AdSense for feeds."



via: support.google