This document discusses how Groupon works for both consumers and small businesses through two case studies. For consumers, Groupon offers large discounts of 50-90% off retail prices on local goods and services. For small businesses, Groupon offers a revenue sharing model where the business gets a percentage of the deal price while Groupon takes a larger cut. However, the case study of a photographer, Eric Hegwer, shows that while he earned some initial revenue, the Groupon deal required extensive hours and had negative impacts to his reputation and customer satisfaction due to unresponsiveness. Overall, the document cautions that Groupon may not be effective for all businesses and can potentially damage a company's reputation.