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Good question! A couple results I just uncovered through Newspapers.com:
Per an October 1982 article in the Miami News, about 30 percent of the city’s OnTV customers—of which there were around 45,000 at the time—bought Star Wars. That percentage was actually significantly lower than those that watched a pair of boxing…
Certainly, UHF is very much still a thing (and due to the winds of modern DTV, UHF is actually a bit more preferable than it was back in the day because the signal quality is better than VHF, if I’m right). But just to clarify, the difference here is that you had to actually pay money to view these channels, or they would be scrambled.