According to first reports it didn't earn all that much money this weekend. My guess is that it is because an awful lot of girlfriends and wives were not that thrilled at the prospect and demurred. Many people I know are not that fixated on fear.
Most men- especially boys - react differently. Especially in the presence of other boys and men.
I'm not particularly afraid of snakes, although when out hiking I was always cautious about poking my arm into recesses. That said, the premise of venomous snakes falling into the laps of panicked passengers does not thrill me.