This is an internet message forum, not unlike any other out there on the internet. This model predates the platforms and services we now commonly refer to as "social media" but still fits every possible definition of the term.
From the perspective of a dinosaur who remembers when going "online" meant dialing into a BBS with a 300 baud modem. this sums it up best.
The WELL, Usenet, BBSes, Delphi, Compuserve, The Source, AOL, Mailing Lists, Web Forums (like this), weren't overtly "social" spaces, like MySpace or Facebook, blogs, etc. I never got into it, but the old time social hangouts occurred over IRC, facilitated by one-on-one chats and private messaging, as a precursor to AIM, and later, Skype.
Usenet was always a Wild West, increasing in severity depending on where one ventured among the thousands of groups. Reddit serves that role now, at least in the mainstream (not "dark web" sense), even down to the torturous UX that many hate.
I still draw the distinguishing line between whether people were primarily drawn to those sites for information, or interests, not as venues to show themselves off first and foremost, or make connections with others beyond sharing the common interests.
So for instance, I signed up here to learn about motor oil, not specificially to learn about how much hock AutoMechanic loves his local Snap-on truck, or the extent of Jeff's man crush on Elon Musk, to name a couple. They probably didn't sign up here to make those things known either, but they have shared those things, and thus, there is a social element involved.