I'm payin $25/mo to join an online community by a YouTuber I follow and everyone is using their real names and real photos (or simulacra thereof). It's pretty crazy.
But I think what will happen is communities will be based on trust, and that trust will eventually be enforced by siloed environments.
Like, right now, I'm guessing that the site's software is probably hoovering up information and it's all centralized somewhere... but maybe in the future, if small communities become the norm, providing real privacy will be a thing.