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Seth Priebatsch, serial entrepreneur and chief ninja at Scvngr, tells Fast Company why depending on viral sharing for growth isn't all it's cracked up to be. [twistage 8bc8d2ad68a1c] Want more great strategy ideas from top entrepreneurs

To hell with dongles. Use your own custom QR code to play at hundreds of merchants with Scvngr's new service.

Seth Priebatsch , a lanky 22-year-old in a fireball-orange polo with matching orange wraparound shades perched on his crown, bounded onto the stage to deliver the first keynote speech at South by Southwest this year.