Opportunism - they just want to profit from the black out to push their own sub. As often, the conservative principles (or in this case rules) are not so important if you can gain any success by ignoring them.
Again? The real nutballs went off to form patriots.win, after they hilariously lost their preferred domain name in an act of negligence (and/or ignorance.) I could see them pulling the same trick again, forming up a Lemmy node that no one else would federate with a 10' pole.