The problem is the economics of operating a track as a business is a terrible prospect. You don't make that much money doing it and you can really only make money on one day of the week if you're lucky. And on top of that you probably only make money during half the year. But leases and mortgages are still due year round. And with the same effort and resources, you could make a heck of a lot more money running just about any other kind of business. RC just isn't very profitable and when different businesses are competing for the same limited real estate space RC just can't compete. It's regular old free market forces doing what they always do.