Omg! Why would anyone pay that kinda money for a room that they spend hardly any time in!
Exactly my point.
Those infinite passes would be a delight to use though 
Oh, you can buy VIP passes for yourself if you wish though, they're €60 per person per day.

Generally not worth doing, but a great bonus if you're staying in the Castle Club or one of the suites.
As for who would use the Cinderella Suite, well a visiting Sheik is a prime candidate, those generally have more money than sense as it is, and want to maintain a certain level of luxury, decorum and privacy and that suite offers just that.
