[Updated 29 July 2011 - The Starbucks 1 for 1 free drink promotion which is supposed run until October ends on 31 July 2011. Below is the announcement at AMEX website:
-Promotion expires on 31 July 2011
-The offer/programme was very successful and it has been fully redeemed and we thank you for your support. We will be launching another programme soon. Thank you,