I have no idea, I think it means whatever you want it to mean. Usually folks interpret it as visiting the sub and then going to a different one but you could also interpret it as leaving permanently, like I said it isn't actually enforced. It's just meant to encourage lots of irreverent posting.
Well sort of the point of 196 is that you can post almost anything, the only rule is that you have to post each time before leaving. This rule isn't enforced for obvious reasons, unlike the ban against tankies.
No one is suggesting that the states the authoritarian communists replaced were good or functional, just that they failed to actually uplift and make people's lives better. There's nothing to admire about one oppressive state being replaced by another.
So called "anarchists" when you touch their pro-state.