Amex wants to turn tweets into dollars

In March 2012, Amex decided to introduce a new plan (https://sync.americanexpress.com/twitter/Index) in order to turn its customers’ tweets into rewards. Participating brands include 1-800flowers.com, Best buy, Dell and H&M. Here is how Amex describes the service:

Sync your eligible American Express® Card with Twitter
Tweet the special offer #hashtags to load exclusive Cardmember offers directly to your Card
Save with an automatic statement credit when you make a qualified purchase in store or online with your synced Card