13/02/2013
American Express announced that members who synchronize their cards with Twitter can take advantage of offers "tweeted" by the financial services company. American Express will promote products in messages fired off at Twitter. Card holders buy items by tweeting indicated hashtags, with their accounts being charged accordingly.
Read more at: http://phys.org/news/2013-02-american-card-users-twitter.html
American Express began letting users of its payment cards make purchases with messages fired off at Twitter as the popular social network dabbles with making money from e-commerce.