Twitter Inc. (NYSE: TWTR) has acquired payments infrastructure service CardSpring for an undisclosed price.

Based in San Francisco, CardSpring is backed by venture capitalists Accel Partners, Data Collective, Greylock Partners, Morado Venture Partners, SV Angel, Felicis Ventures and the Webb Investment Network. The company provides commerce services to retailers and digital publishers to assist shoppers. Among the offerings are electronic coupons, loyalty cards and virtual currencies that work with credit cards and other types of payments.

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