I generally only use Facebook as my main social media. where i’m active on the NMIT-IT page, i’m not a fan of the style of twitter or vapid-ness of instagram
Does a skype chat count? because i’m part of one that has 12+ people in it? i doubt it does.
and i regally post and browse Reddit. personally i think its a pretty important social media that we didn’t really discuss all that much. allows better communities to form around subjects and topics. where a developer or whatever can contact its audience a lot better than like a facebook page or hashtag.