American Express lets Twitter users shop via tweet

http://en.wikipedia.org/wiki/American_Express

American Express is rolling out a new service on Twitter that lets card holders make purchases on the social network through specialized tweets.

Dubbed “Amex Sync,” the technology integration will allow Amex users who sync their cards with Twitter to buy products just by including special hashtags. It launched on Monday with an offer for discounted Amex gift cards and will expand to include a range of physical products from companies including Amazon, Sony, Urban Zen and Microsoft’s Xbox business.

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Story added 12. February 2013, content source with full text you can find at link above.