And also, after doing the course once, assuming the park offers one time shots at it, what is there to really do again? It's fun and all, but I don't see doubling the admission price to go on a zip line a couple of times.
Maybe in a couple of years, once Indiana Beach (hopefully) lowers the cost, I'd try it. I was so super dooper excited when I heard about the addition (I'm obsessed with this park, and might get to go for the first time this year!) but it probably won't happen for me. Unless it's like 8 bucks to go once...
EDIT: I wouldn't buy the season pass anyway, because my parents would never take me more than once a year. They dislike my theme park obsession...