He’s writing in a place he asserts doesn’t exist. 

He’s also writing badly: “… everyone shifted to Mastodon; I used to like posting there.” Don’t write it like that unless “there” means Mastodon. You’re writing one damned sentence and I have to do the editing work in my head.

You know, if he’d given a link, I’d have checked out his writing on Mastodon. I even tried googling his name and Mastodon, and I couldn’t find it. I found the — a? — Mastodon site and searched for his name and got 4 links. I clicked on all 4 and found no content.

Somehow “everyone” is there, but I see no one.

UPDATE: Commenters are telling me it’s sarcasm. I don’t know why I wasn’t more attuned to the kudzu of the internet.