Holiday shoppers can head to The Sharper Image online for quadruple miles and a virtual gift certificate of $20. A minimum purchase of $100 is required and the offer is available through Jan. 31. The caveat is that your purchase of $100 is not immediately reduced to $80. Your online gift certificate actually works more like a rebate, and is mailed with your order.

Link: http://www.sharperimagesavings.com/4xmiles