Subreddits are composed of communities which (in theory) are self-moderating. The communities themselves can be publishers or platforms, the question here is about whether or not Reddit should have the editorial authority to delete subreddits at will.

Here is a small list: https://en.wikipedia.org/wiki/Controversial_Reddit_communiti.... Most of these subreddits are not Nazi or Stalinist-level hateful, but could still be considered hateful (the definition of hate is actually very shaky, I regret saying "objectively hateful" in my above comment).

I could back to you with a longer list of more underground subreddits, though I don't really have the time to. You can go to something like https://reddit.guide and search for subreddits similar to the ones banned. Plenty are still active, just much smaller.