"It's been exceedingly effective," Miles Nadal, chairman and CEO of one of the largest ad agencies in the world, MDC Partners, which owns Crispin Porter, the firm that made the Groupon commercial, told CNBC on Monday.
"They have over 50,000 new customers that have come on board since the ad ran, so its actually drawing the kind of business performance that we expected it to," Nadal said.
"You have to understand there is a difference between popularity and business effectiveness," Nadal said, adding, "strategically Groupon has always dealt with social issues from the very evolution of the business."
"We're happy to be part of the conversation," he added.
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