You're not paying for facility access; you're paying for group instruction. I don't think the gyms make that much but the Crossfit corporation is printing money. Go to crossfit.com and look at the schedule for certification testing; every one sold out months in advance. Reebok gave them a truckload of cash last year. Any fitness related business I would attach the word Crossfit on it and double your profit. You can setup a Crossfit gym in your detached garage for < $10,000 versus God knows what for a Gold's.
I do find it hilarious that Crossfitters are hell bent against "globo gyms" just being about getting big numbers when companies are tripping over themselves to profit off the Crossfit craze. Clothes, shoes, gyms, equipment, supplements, Paleo cookbooks,