I'm amazed how bad this partnership is for people who regularly go to MGM. There is absolutely no reason to book with Marriott when the MGM rates are so much better. I was used to getting a few free Hyatt nights per year based on my Vegas trips with my room and dining etc. spend and now MGM tells me I can't add my Marriott number to a reservation or get any points whatsoever... you would get Hyatt points no matter how you booked and on any spend at any MGM property. Now... zilch! Really stinks.