For rewards stays of 10 days or more, make two or more five - day bookings in order to apply the «fifth night free» benefit. (creditcards.com)
This will make using points for reward stays much more flexible, especially for members who don't have enough points for a full night. (dreamtravelonpoints.com)
Furthermore, every 5th night with the hotel will be free when you book reward stays of five nights or more. (valuepenguin.com)