Not a good deal actually. Remember, RZ accounts reset in January (jan 1st if i recall). Therefore you're only getting 2 months of silver. Also, it takes 30 days for points to show up. Thus making all purchases in December pointless as you won't see those points mature into certificates.
So you're only getting one month of the full service.
Now if they offer this at the beginning of the year, that's a different story