Irony happened.

Instead of going private, they only restricted posting to mod-only

It turns out they were the asshole all along.

Jokes aside, I think AITA is blocking new submissions.
Certainly the last post on the sub is from a mod describing the blackout, which was published 9 hours ago.
So, they might have decided to stay public for exposure to the issue. But there is no new content flowing

They became the very thing they hoped to destroy