Just because it dont appeal to you doesn't mean it doesn't appeal to anyone else, the Crash pad version 1 was clearly a success for the park hence they are expanding it and taking it further, so people are clearly happy with the offering?
I stayed there a couple of times last year, with prices at around £29 per person on the day I thought it was good value, although we dont know the on the day prices yet.
As for comparing to the others, its all about demand, theres no point Thorpe Park building massive hotels just yet if they cant fill them, if people are happy paying less and staying in a room like the Crash Pad then I dont see the problem?