Groupon (NASDAQ:GRPN) is the black sheep, it has not been able to rise higher than its IPO price. Groupon is a social networking site that allows groups to get discounts for local businesses. Once you subscribe to the site, you will be begin getting emails for deals at local venues. The problem, no earnings. The company has yet to produce any earnings that would prove its revenue model works. If it could produce earnings, it can result in a Facebook like rally. So the questions investors must answer: is Groupon likely to prove its revenue model.