Review: So many coupon sites, so little time
Wednesday, February 23, 2011 - 15:30
in Mathematics & Economics
(AP) -- If Groupon isn't as ubiquitous as, say, Facebook, it's getting there. The website, which offers daily coupons to local restaurants, bars and other businesses, has 60 million members worldwide, about half of whom live in North America. Those controversial Super Bowl ads surely introduced it to some new customers, too.