Those are fediverse toilets. If you shit in one of them it will be available in the other one too.
This is the way.
Like I said, I’m already on a different instance (feddit.uk) but the instance I’m on seems a bit flaky. There are communities on other instances that don’t show any content, whereas they do on lemmy.world. I’d heard that lemmy.world was handling the influx of new users quite well in comparison, so thought I’d try to switch.
I think there might be some sarcasm going on there given the tone of the post, and the fact the upshot of it was to propose a vote on whethe the rules should be changed post-reopening to only permit pictures of “John Oliver looking sexy”.