I've been told that individual mods decide on the censorship of the areas they control. For example, people are allowed to discuss tipping in some topic areas, like
DCL (cruise vacations), but it is forbidden in other areas like Restaurants.
I got into a discussion about this with a restaurant mod, who told me that "the plebs" who post about restaurants cannot handle that topic. They essentially lose their minds (his words, not mine) whenever the subject comes up. So they need to be censored to keep their baser instincts in check.
However, folks who go on cruises are more refined in their tastes and online behavior. So they can be trusted to discuss tipping in a civilized manner free from censorship. No doubt, a certain well known individual that prefers cruising over the parks would agree with this LOL.