Value-exchange advertising company SponsorPay today announced it more than doubled revenues in 2012 thanks to a 479 percent growth in transactions on its platform.

SponsorPay credited this growth to its BrandEngage platform, its mobile ad network and user acquisition campaigns for Fortune 500 brands and app developers.

“Mobile became the dominant growth engine for SponsorPay last year,” CRO and co-founder of SponsorPay Janis Zech said. “It’s still early – mobile ad spend will grow exponentially over the next few years, and our aim is to continue to outgrow the market significantly.”

SponsorPay also touted conversion rates on social engagement were as high as 76 percent, and click-through to online retail pages were often greater than 30 percent. The company cited its Domino’s campaign specifically, which integrated video ads into social games, resulting in 36 percent clicking through to the Domino’s online ordering page.

You can read our full interview with Zech about SponsorPay’s plans for mobile in 2013 here.