Oh Here's more and it sound like that did cover Adwords referrals too.
What happened to referrals?
During the last week of August 2008,
the AdSense referrals feature was retired for both AdWords advertiser products and all Google products, including AdSense, AdWords, Pack, Firefox plus Google Toolbar, Apps, and Checkout. After careful consideration, we believe that we can best
serve our advertisers and publishers through our AdSense for content product.