The information needed to know this is not at our disposal. Suppose (example pulled from the sky numbers) there are ten rooms with pools and 100 regular rooms. If the hotel always sells all the rooms with pools and regularly has ten empty regular rooms, and the hotel knows after they book the ten rooms there is a waiting list of 20 more people who will book the larger room up to the last minute, for cash, but are not booked in the regular room. The hotel would be doing the right thing by not moving a guest to a larger room for a 30 EUR UG above a points redemption. The hotel would lose the difference between the points redemption cash from Marriott, which is low, and the regular payment for the room. We just don't know the actual numbers, but the hotel staff does and they certainly would be acting in a way they think would maximize profits.