That Google +1 button is sprouting everywhere, and now the +1 button is slated to appear in Adsense ads. Below is an example from the Adsense Insider blog.
Now your “social friends” can see what ads you like … I don’t know if that’s good or not, but its good for Google whose ads will start appearing outside of their environment. According to an email announcement to Google Adsense publishers, you can opt out of the +1 button displaying on your site’s ads if you are a publisher.
The email also said:
Soon, your users will be able to endorse specific ads and make the ads more likely to appear to their social connections. We believe that these recommendations could help your readers notice ads on your site more, leading to higher returns for you over time.
Well, voting on Google Adsense ads is something I never expected, not even after Adsense started appearing in Yotube videos!