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"The QR barcode has become the gateway to information, data exchange and mobile commerce with the Smartphone acting as the primary device for every consumer interaction. Browsing and buying merchandise through QR barcodes is happening like never before, and social media has further accelerated this phenomenon."

(I think a lesson here is that you have to think about the content associated with the code to make it interactive and engaging. The novelty of scanning will wear off pretty quickly.)