I think a lot of people have facebook accounts but dont use it for facebook. Messenger, instagram, marketplace… I’d guess that most people using those services don’t actually “use facebook” and probably think they arent providing profitable data to meta by using those services.
I have .solutions and .info domain emails that still gets denied by some services, especially anything government or public utility, pain in the arse.
You’d think that at least .info would be pretty well accepted by now.