Jack in the Box is running a good gift card promotion: Get a free $20 dollar Jack CA$H® Card when you buy one $20 Jack CA$H® Card with any American Express® Card. To take advantage of this offer you need to call 1-800-955-5225, select Option 3 and then Option 2. If you are thinking of taking advantage of this offer make sure to ask about any other restrictions regarding the use of the card.
Here are more details about this offer, but the fine print reads: This offer is valid October 12, 2009 through November 30, 2009, or while supplies last. Limited time only. Not valid on previous purchases. Orders valid for phone purchases only. Orders processed Monday through Friday 8:30 AM to 4:00 PM (PST) only. Orders will be processed within 48 hours and delivered via standard U.S. Mail delivery. Cardmembers may receive a maximum of $100 in free Jack CA$H® Cards per person through promotional period. $20 Jack CA$H® Cards will be awarded either in one (1) $20 or four (4) $5 Jack CA$H® Card increments. Offer valid when you pay with any American Express® Card.