Advertising leads to increased profit, on average. Groupon did not. Their whole proposition was bogus, and they knew it from the beginning. Their business model

Advertising leads to increased profit, on average. Groupon did not. Their whole proposition was bogus, and they knew it from the beginning. Their business model required a constant supply of small business owners who'd make the wrong decision. It was despicable. The difference is that Groupon never acted in good faith.