American Express has been offering amazing deals when you use Foursquare and Facebook, now they are migrating to Twitter.

All you have to do to get the rewards:
Sync your AmEx account to your Twitter account, send out a tweet using an assigned hashtag. then when you purchase an item at that store using your card, you will get a credit on your statement.

Some of the stores that are working with AmEx are Best Buy, Whole Foods, Ticketmaster, Dell, McDonalds and more.

To learn more about this program and the companies visit here

Disclosure: No compensation was received for this post.