I received a tri-fold postcard offering bonus miles: "We value your business, and to thank you for carrying the Citi / AAdvantage card, we want to make it easier than ever to earn more American Airlines AAdvantage miles. Earn an additional 0.2 AAdvantage miles for every $1 spent on eligible purchases until 06/30/12. That's 20% more AAdvantage miles on what you buy. This includes travel, dining and every day items like gas and groceries." Then, there is a phone number to call and an invitation number. I believe this is targeted, but keep an eye for this mail piece if you have AA Citi cards!