I am an accountant in the hospitality industry. From my experience, I would expect something like this to be an effort to increase likely sad occupancy numbers on Monday/Tuesday. Pay for Friday and Saturday, which is probably common, and get two more days for the half the cost of the already lower Monday rate? People will take the deal. Most of their customers are not hardened theme park vets that have a solid understanding of how much there is to do at the park. It makes sense to use the beds as a loss leader to drive further revenue in the park to offset it. Food, drinks, souvenirs, etc.