Really users? This is news? I'll echo what I've said in another comment (https://news.ycombinator.com/item?id=30769570) regarding GitHub being a social platform:
> GitHub has always branded itself as a "social collaboration platform" rather than anything else (well, first "git hosting" but secondly the social stuff).
> Here is a early version of their landing page from 2008 (the year they launched): https://web.archive.org/web/20081111061111/http://github.com...
> Notice the logo says "Social code hosting" and the messaging of the page is mostly around popular repositories, collaborative features and other social elements.
Anyone surprised by a "social code hosting" platform implementing new social features are in for a bleak feature, as the platform still aims (and always have aimed) to be the social place for coders.