I have a feeling they're cracking down on personal subreddits due to their own loophole in the upcoming change to NSFW content. If I interpreted everything correctly, Mods still get to see the full range of NSFW content, meaning seeing NSFW content even in subs that they aren't a Mod in, whereas regular Reddit users are restricted.
In any case, I find it ironic that they talk about the duty of being a Moderator with such importance, and yet Mods aren't even paid, AND... it's quite a common thing that many subs have wildly corrupt Mods. I've no joke been PERMANENTLY banned from certain subs for criticizing a movie, a recent episode in a TV show, etc, and I wasn't even a member of the sub for more than 24 hours. Like, ok, maybe I'm being a bit more harsh in my criticism than others, but when did it become a crime to have an opinion?