Operated by the same folks that give you @ 3 dozen+ online boards related to everything from specific RV brands to the band U2 or cooking. A couple of folks sitting in some office, letting volunteers do most of the work gratis with the only compensation being getting to feel important, while raking in the cash every time someone clicks a link. Nothing wrong with that, it's business. They'll configure it based on what brings them the most income. If one does not like it, don't visit it.
IMO if your letting reviews on that site steer you away from certain campgrounds you're probably avoiding some really nice ones. There are plenty with mediocre reviews that are really nice places, but because Joe Blow could not get his 92' rig into a 30' site, had to put a 2X under a tire to level and seen a fly in the showerhouse he chastised the park.