While I do have my own mobile Wifi, there are still quite a few places that do not have a Verizon signal (although Verizon no doubt has the best coverage). When a campground advertises Wifi in such a place, I do expect it to work--preferably well--but even slowly is better than nothing. I ran into a few parks in Canada and Alaska that limit data usage to 250MB per 24 hours and I'd like to be notified of this before I pay for a site. Yes, I would pay extra for good Wifi. And, no, I don't do video streaming or anything like that. I don't believe RV Parks should advertise Wifi unless it's actually functional.