As proof of eligibility, a Membership Number is required when redeeming an Instant Redemption Award. (marriott.com)
The other three choices a member needs can choose from are in the free night and redemption awards category, merchandise discounts, and elite night credits. (frequentbusinesstraveler.com)
It's a Quarterly 5 % Rotating Cash Rewards Credit Card, but has a unique advantage over the other 5 % rotating cards — you get to pick the 5 % cash back categories — and there's an additional redemption award! (mydollarplan.com)