Love this idea, always wondered why they didn't do this (speaking from a business perspective, I dont buy 1-day tickets so I couldnt care less either way). I don't see what's complicated about paying the price they tell you to pay for a certain day. They aren't asking you to negotiate with them. And the suckers who are out of the loop enough to buy 1-day tickets in the first place probably won't even know there's a difference in pricing.