I had the Marriott Concierge switch my promo over. This is the confirmation I got:
"I have documented your account of the alternate Summer Global Promotion offer. You will receive an electronic free night certificate valid at hotels in categories 1 through 4 after every two paid stays, up to a maximum of three rewards. The certificates will be credited to your account at the end of the promotion."
Anyone read this to mean the end of the Summer Bonus earning period? Or should I reach out to customer service once I have completed all of my qualifying stays?