They’ll possibly be verified through their own domain or another (Nip-05) plus their public address will allow they to tell people if they’re who they say they are which they can post on their other socials or websites
Discussion
I suppose they all have what they would probably call "IT guy" on payroll to set that up for them.
Possibly I would imagine they’ll want them to do it for them to get rid of the so called fake accounts that and their npub can’t be replicated so it’ll be two ways to verify them