Just checked my adsense account and I'm suddenly seeing feed impressions when adsense for feeds was retired? I got the email from Google a long while ago about them being retired along with feedburner. Confused to say the least.
AdSense for Feeds was designed to help publishers earn revenue from their content by placing ads on their RSS feeds. Starting October 2, we’ll begin to retire this feature—and on December 3 we’ll close it. Publishers can continue to use FeedBurner URLs powered by Google, so they won’t need to redirect subscribers to different URLs