Social Extensions Discontinued
According to the announcements in the Google Partners Help pages, Social extensions are no longer shown with Ads if you are using it in your search advertising campaigns. This started last December 10, 2015.
What are Social Extensions?
Social extensions are one of the twelve types of extensions that can be used to enhance your ads for your search advertising campaigns. They fall under automatic extensions, meaning, ads that appear on Google search and the Search network show them when the Adwords system can link the ads to your active and verified Google+ page.
These extensions show how many Google+ followers and +1s that your company or website has if the Adwords system determines doing this would improve the performance of your ad campaign.