by invitation only https://enroll.amexnetwork.com/US/bestbuy1/
Get $40 when you spend $200 or more in one visit at Best Buy.
Enroll any eligible American Express® Card to get a $40 credit on your
American Express statement. To qualify, spend $200 or more in a single
visit at a Best Buy store or online at www.BestBuy.com with your enrolled
Card. Offer valid through September 30, 2010.