"But like so many other companies in these golden times, Coupons.com simply told investors to exclude about $13 million of normal everyday expenses and, abracadabra, it claims to be profitable on a nonstandard, cockamamie "adjusted Ebitda" basis. It's all part of the show."
My impression is that Groupon made up their own mumbo jumbo financial metrics, but that adjusted EBITDA is a pretty standard financial metric.