Okay, I maybe have a theory for the first name ''Profile''
Maybe some of you guys know that if you play WZ Single Player, the website or youre phone automaticly makes an account without you creating one, maybe its only on phone idk.
So that account is overwritten if you make a real acocunt, the auto-account is named standard ''profile'' and its 22k times named like this cause its in the database.
However if you search names with muli's userscript or if you wanna invite someone in a game and search for player you wont find 22k people cause the auto-accounts named profile dont have permission to play multiplayer but have to stick with Singleplayer until you make an account. Perhaps 22k players played SP without actually playing after that with making an own account.
Also when I made my alt the singleplayer levels I completed on my main were transferred to my alt. I guess this is because it still have to transfer from the automade account to youre own account.
Note that this is just a theory