Jaws' is a classic. It's on TV often, so really, every day it's getting a new audience. When you watch people arrive back in after they experience it, and they're screaming and laughing, you see it has this appeal that still holds.
The theme parks have always been an incredible experience that some people treat as a commodity. So as long as there have been theme parks and theme park tickets, there have been people trying to take advantage of that.