I've similarly ghosted social networks and other "platforms" some years back. A culture is usually formed around shared experience. In the case of social media escapists there are two sets of shared experiences:
The escapists themselves are simply living their lives as usual. This sort of baseline human experience is a rare thing these days, but it doesn't get much exposure because escapists aren't likely to go out of their way to broadcast their experiences - that would be antithetical to the idea of disconnecting from social media.
Other people are wondering where the escapists have gone. Did they die? Move to Mars? Get convicted of a major crime and sentenced to a long stint in state prison? This too takes places quietly: it's not as if anyone's mounting a nationwide search to locate the escapists.
These experiences to me form a kind of bifurcated culture.