Whenever there have been figures that have shown the hundreds of thousands (if not more) players who have played Classic on private servers, these numbers are immediately dismissed with rhetoric like "they're only playing on there because it's free, they wouldn't actually pay for Blizzard's official Classic WoW".
Yet when the cost of WoW in general is being discussed, it is often these same people who then turn around and say things like "WoW is so cheap, it costs less than a movie ticket".
So why would the cost of Classic all of a sudden be a barrier to entry? Why would those hundeds of thousands of engaged players (presumably) not pay less than a movie ticket to continue enjoying what they were on private servers?