NSFW subreddits don’t appear on r/All or r/Popular. (NSFW posts can appear, but only from subs that aren’t flagged as NSFW themselves).
So the current protest method is somewhat counterproductive. People who never took the step of subscribing to these subs likely won’t see them at all.
It sounds like this will become a problem if/when content providers start requiring it.
Like how Netflix requires certain hardware to enable 4K. (At least I think they do? I remember that was a thing a few years ago.)
https://learn.microsoft.com/en-us/windows/security/information-protection/pluton/microsoft-pluton-security-processor