I average close to 200 Marriott nights a year. On the business side, a Platinum override will get you in a property but not at a normal price. That's gouging a loyal customer. You also allow properties to blackout select dates when they do not have to honor a platinum override; again obviously a flaw in your thinking. As to the free fifth night when using points, it should be a free night on any stay of 5 nights or longer.