In that sense, it is like the Bloomberg-owned station in New York City: brand enhancement.WSM is a direct promotional and marketing tool for the Opry. It is possible that the station lasts and lasts for a long time because it will always hold value to Ryman in ways a conventional radio station cannot.
It is hard to put a value on "brand enhancement" but I'd say that if any station has such a quality, it is WSM's value to the Opry.