I do have facebook, but use it in selected way. Not really accepting "friends", as I don't post anything on my own profile, so there is nothing to follow. I don't follow labels, bands or... almost anything really. Just couple of groups where discussion (hopefully) happens. Besides that I do post mostly in Finnish at my fb pages of my physical record store (Sarvilevyt).
I do write about records or whatever on that page, but never include links how to actually buy it. People may know where to buy it (from me, or somewhere else, don't really care). Store is not there to "business" as much as it attempts to just cultivate underground culture.
It is almost surprising, when the thing is called SOCIAL media, how... antisocial it actually is? I would rather see underground based on communication and ideas, and rest follows, and idea of sitting in front of IG feed waiting ads for stuff that sells out in blink of an eye, is pretty much antithesis what I hope underground to be. So IG marketplace noise - I will miss that stuff most likely, but it is choise not to be more involved in "social media", and minimizing active participation in how it changes the nature of art (noise or something else).