Offer Details:
To be eligible for the $10 gift, reload a minimum of $50 on a Starbucks Card using a Visa card. Void where prohibited, taxed or restricted by law. The offer is valid only online when paying with your Visa card. Offer is valid in the U.S. and Canada, excluding Quebec. This offer is valid now through February 28, 2006, and cannot be combined with any other promotional offer or discount. The $10 gift load will be loaded onto your Starbucks Card by March 17, 2006. Limit one $10 gift load per transaction.

https://www.starbucks.com/card/visa_promo.asp