Marriott: Buy Two Get One Free

Register here for Marriott's latest Megabonus promotion by November 30 to earn a free night at any Category 1 through 5 Marriott after completing two paid stays between tomorrow (September 12) and January 15, 2018.
How Marriott is Defining a Stay
For the purpose of the Megabonus promotion, a qualifying stay is consecutive nights at the same hotel.