I currently have the Marriott Premier Credit Card and the Starwood Credit Card.
I have read that starting in August, the 15 night credits will not stack from both accounts. However, I have not been able to find anything specifying whether or not the free anniversary nights will stack.
Does anyone have the answer to this?
Also, if I upgrade to the Marriott Premier Plus, and my anniversary night is soon after, will I get the free night credit or will I have to wait another year to get it?