I just noticed that the Amtrak sponsored 10% Marriott Gift Card Bonus is back. This promotion ran last year in 2012 and is now in effect through August 31, 2013. When you purchase a Marriott Gift Card using the link below with Promo Code "AMT" you will receive a 10% bonus on the Gift Card. Here is a link and terms of the promo:
Amtrak 10% Bonus Terms and Conditions
This is an online promotion only and cannot be combined with any other offer. Offer not valid on Marriott GiftCards purchased via Marriott properties, 3rd parties or 1 800 813 GIFT. There is no limit to the number of GiftCards that can be purchased. Offer not valid on purchases of eGiftCards. Valid July 1, 2013 through 11:59pm EST August 31, 2013. GiftCards purchased between $25 and $1500 are eligible for the 10% bonus. You must enter the AMT promotion code to have the 10% bonus added to the value of the GiftCard you purchased. The 10% bonus will be reflected on the card amount once received. *If Express Shipping is chosen, please allow 1-2 business days after delivery for the 10% bonus to be reflected on the card balance. This is a limited time, limited inventory offer. Marriott Rewards points will not be earned with the purchase of the GiftCards. Shipping and handling fees apply. $1 shipping option available to U.S. addresses only for orders less than $1,000 USD. For full Promotional and Marriott Gift Card Terms and Conditions, visit gifts.marriott.com. Marriott International reserves the right to limit, modify, delete or otherwise change the Terms and Conditions of the Program, including these rules, at its sole discretion, with or without notice. All interpretations of these Terms and Conditions shall be made at the sole discretion of Marriott International, whose decisions will be final.