Been aware of this for a couple of years now. I do some bookings of meetings and always get 10 room nights, it shows separately on my totals but is included for my platinum status. Have three already booked for the fall so looking forward to my 30 extra nights as well as triple marriott miles if you use a visa card to pay for the event. My meetings are a little more substantial with a luncheon usually for a $3-5K spend for 50-75 people.