For a limited time the referral bonus on the Starwood Preferred Guest (SPG) Amex cards has been doubled from the typical 5,000 Starpoints to a whopping 10,000 Starpoints! This is a fantastic opportunity for referring your friends. I value 10,000 Starpoints at roughly $250, which is a huge bonus to be offered for any credit card referral.

Unfortunately, the 35,000 sign-up bonus is no longer being offered on the card; the offer is down to the standard 25,000 Starpoints. Still, with the future of both the SPG Amex card and the SPG program itself in question, it may be time to jump on a product that may no longer be offered in the future.