It's quite simple, you just make a profile and chat, I've never explored it much beyond what the Wiki chats are classically used for, but it allows you into any Discord anywhere if that's your thing. I personally would love it if you joined.
So, I get why you moved that guy's page, but technically since he had the reality designation first, it's supposed to be you changing your reality designation. I can let it slide since he's an inactive user with the one page, but do try to refrain from that if you can.
I'm sorry, I know I just figured since he was inactive and it was just one page it would be okay, but you're right it's supposed to be first come first serve. I can go through and change mine if you want, I just didn't want to have to do it again since I already changed it twice