To me, having a profile with some kind of “like” system (karma) makes it social media. The main incentive is to gain upvotes which dramatically changes the way in which users write their thoughts. Even though there’s nothing tying the “real me” to my profile, I still know it’s me and am incentivized to make posts that will garner more votes. SO, Quora, forums etc all count. Only when people are truly anonymous, with no “score” being kept do I believe it doesn’t count.
