Groupon: Growth on a Broken Model

Groupon became the fastest company in history to reach about a billion dollars in revenue, and turned down a reported $6 billion offer from Google in 2010. The model looked elegant: discounted local deals, a cut of the revenue, free marketing for merchants. Then it started coming apart almost immediately, and the flaw had been sitting in plain sight at the merchant counter the whole time.

This is a finance and unit-economics case for any operator tempted to read fast revenue as proof of a real business. It sharpens the discipline of stress-testing every party in a transaction, not just your own take rate, before you pour capital into scaling. Why the merchants and the customers both turned out to be the wrong kind, and the honest question to ask before you grow, is what the app forces you to confront.