Constant Contact, an email marketing company, announced its acquisition of mobile app developer CardStar this week. CardStar developed a mobile app where consumers are able to store all of their existing loyalty cards, rather than having to carry multiple, physical cards. Constant Contact will continue to operate CardStar’s free mobile loyalty application, which is available on major mobile platforms, including iPhone, Android, and Blackberry. Retailers can also offer coupons and special deals ...

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