I think leaving it up is just the path of least resistance to them. Censoring such an ever-present message is going to have more catastrophic consequences for their PR. Think of all the media talking about how Reddit’s violent censorship is supressing what users have to say?
Plus, they’re not honorable at all. They definitely have been deleting dissenting comments and deploying bots to astroturf all conversations about their new policies. The only reason why they’re leaving the “fuck spez” messages is because it’s purely symbolic while users feel vindicated and don’t make a bigger stink.
I found this the other day:
https://rplace.live
Sure, it’s not Lemmy, but otherwise it’s exactly what you asked for.