That Community Influence clause is interesting and makes me wonder how a lot of games manage to keep their rating below M once they're popular enough to get picked up by certain - what's the word here, influencers, personalities? and their followers and/or certain communities while keeping really lax moderation standards.
If that's a valid criteria for ratings I certainly wonder how XIV keeps a T.

I still fail to see how the PF listing in the OP is in any way explicit on its own but the things a noticeable (as in visible/present, not neccessarily size) part of the community gets up to in the game could warrant an M rating as SE is quietly tolerating it by not doing anything to dissuade people. Is covering it with the ToS enough to protect the rating if the relevant parts of the ToS don't seem to get enforced?

I don't really follow ESRB ratings as it's not the system my country uses, have there been cases in the past where a game's rating (or maybe the rating for a new expansion for that game) was bumped up because of the game's community interactions?