Facebook and Groupon are quite different: the former tries to create products to create value for users, developers and advertisers, enabling people to stay in touch with loved ones; the latter is an e-commerce marketplace connecting merchants and consumers. However, these two sites share three economic advantages that make the “a perfect match for each other”: economies of networking, economies of scale, and the power of word-of-mouth and buzz. Groupon’s low market valuation and lack of debt would also make it a bargain for cash-rich Facebook. (Forbes)