The key point here is that this is the one time HE GOT CAUGHT and now there are a lot of people wondering if the admins have done this in the past? Has any admin, say during the whole Pao garbage edited comments? This action created uncertainty, and I know a few lawyers that make a great living off exploiting uncertainty.spez apparently did write/alter/interact with the content himself or had a script do it or something. I guess he redirected negative comments aimed at him to the mods of TheDonald. In other words, the reddit CEO did become the publisher/speaker of that particular content and therefore threw away the protection of 230 for only that particular content.
There was one instance I remember from many years ago where some admin edited a post title. I can't remember the context but think it was fairly innocuous. As far as I know no one really caught onto it but it was discussed in a private defaultmods subreddit and last night I could not find anything on google about it. But server logs would certainly show whether or not that happened if it ever became an issue.