I have said exactly this several times here. And Le Cellier is a great example.
It used to be a good restaurant, one of many in Epcot. Decent food, decent prices (for Disney). Always well patronized, but DR's were relatively available. Then, somewhere along the way, people started to think and say it was actually better than it was. People listened, figured it was true, and HAD to go to see what it was all about. Then more people, and then the feeding frenzy starts. People just HAVE to go there or they are nobodies. Disney sees what's going on, filling the place, packed every hour it is open, DR's hard to come by, almost like the castle breakfast frenzy. Disney hits paydirt. $$$$
Disney sees they can actually lower the quality of the dining experience and people will still come, because people just HAVE to go there, it is THE place to go. Disney sees they can raise the price, thereby even justifying making it a 2 credit restaurant for those that have a dining plan or 'free' dining. People just keep coming, DIsney raises the prices to about $100 per person for out of pocket and maintains the 2 credit, along with even lower quality.
And so it goes, it is self fulfilling.

I haven't eaten there in at least 10 years.