Social extensions are going away in Adwords starting from December 10, 2015. Means you will not be see the details of followers with your ads after 10 Dec.
If you login to Adwords in this month (Dec), you can see the a massage in notification tab that “Starting December 10, 2015, social extensions will no longer show with ads on Google Search and search partners.”
What is social ad extension?
Social extension is an automated ads extension and it shows the Google+ follower details with text ads on search and display network. Normally this extension available when you having more followers and more chances of engaging users through your great social repo.
How much will affect your ads after social extensions feature gone?
After social extension removal, not too much affect your ads, click and impression. Google is continuously doing many changes in Adwords and working for best input and ROI. You can use other ad extension like call out and site link for improving your click and impression.
Negative part of social extensions
Social extension, just show the followers details without any website link and take too much useless space for highlight Google+ details . Its main reason that Google withdraw this ad extension and emphasize you to use other ad extension which directly effect and will be improves your click, impression and revenue.
Read more details about recent Social extensions updates: https://support.google.com/adwords/answer/2370009