Groupon's promotion with Gap generated $11m in revenue

"[The] success story belongs to Groupon whose national promotion for Gap last week resulted in income of $11 million from sales of a $25 coupon worth $50 of store merchandise to over 440,000 shoppers, according to AdAge. While Gap has yet to see how many coupons are actually redeemed, Rob Solomon, Groupon’s president said,
“I’m pretty sure if they ran a national TV campaign, they wouldn’t have gotten nearly 500,000 paying buyers in the store.”
Less than two years old Groupon began as a locally-oriented service offering a “deal a day” to subscribers in particular cities who give Groupon their email addresses. The twist is that an offer is only redeemable if enough people express interest in it. With redemption rates exceeding 80 percent on average, Groupon’s growth is easy to understand since it often splits the value of the offer as part of its revenue."
Source:  Rob Solomon of Gap, reported by AdAge and ReveNews, 26th August 2010