March 7, 2012 07:28 pm GMT
Original Link: http://feeds.mashable.com/~r/Mashable/~3/TdoUH6gW6OM/
American Express Program Offers Discounts for Tweets
American Express, which has already launched programs with Facebook and Foursquare, is tackling another social media channel with a new initiati…Original Link: http://feeds.mashable.com/~r/Mashable/~3/TdoUH6gW6OM/
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