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Facebook celebrated its ten year anniversary in February 2014. Over the past decade it has grown into the largest social network in the world with one billion users. After filing an IPO in 2012 at a $104 billion valuation (the third largest IPO in U.S. history), the stock price steadily declined, but recovered after the company implemented an effective advertising strategy. Facebook worked to maintain its "hacker ethos" and remain nimble as it matured. The company was worth close to $200 billion. Could this kind of value sustain itself for years to come?

MentorMob had sprung from the passions-for web development and for online communities-of the company's co-founders, Kris Chinosorn (CEO) and Vince Leung (COO). The company pursued the ambitious goals of reinventing the way people learn and becoming the world's utility for learning about anything. The website leveraged a crowdsourcing model for information sharing, teaching, and learning. By enabling participants to learn-and to crowdsource from each other while learning-the site sought to both engage users at different stages of learning and to develop a compelling experience unobtainable without a crowd. Chinosorn and Leung needed to prioritize in order to achieve the growth and scale needed to become world's utility for learning. What should they do next to keep MentorMob's growth on track? What issues should get their greatest attention?

In 2009 Wikia was the Internet's largest for-profit provider of hosted open-source wikis, with over a million daily users. After five years of existence, the organization had supported a wide range of exploratory activities, experiencing both success and failure. With approximately $3 million of cash on hand, Wikia turned cash flow positive in 2009, with revenues of approximately $4.5 million, affording it time and flexibility to try new things. Some of the company's employees and investors suggested that Wikia should attempt to expand and market itself more aggressively, but which strategic direction should receive priority? The case presents many of the issues and tradeoffs facing CEO Gil Penchina as he formulates these priorities.

Encyclopaedia Britannica was the leading provider of encyclopedias in the English language, but after sales declined rapidly in the early 1990s the company was forced to file for bankruptcy. Many different organizational and market factors contributed to this crisis, such as the diffusion of the PC, the invention of Encarta, the technical challenges of moving text to electronic formats, and the difficulties of inventing a new format while also operating the leading seller of books. Looking back, what could the company have done differently?

By 2006, Wikipedia had achieved the type of success that only a handful of young organizations could ever dream of reaching. It had grown from almost nothing in 2001 to become one of the consistently highest ranked and most visited sites on the Internet. This success brought new problems at a scale that no organization of this type had ever before faced. Exposes students to Wikipedia's brief history, the causes of its success, and the issues it faced going forward. Two topics form the focus: The first concerns the rules and norms for submission and editing, which raise questions about the ambiguity of Wikipedia's authority and the virtual cycle that keeps the site going; The second concerns the need to alter its practices as it gains in popularity, raising questions about what any wiki site, profit-oriented or open source, must do to scale to large numbers of participants and entries. These issues arise as part of a discussion about the site's priorities going forward.

This article interprets the early experience of Internet Service Providers (ISPs) in terms of the market for technological mediation. A firm involved in technology mediation takes advantage of gaps between general technological opportunities and particular user needs in specific places at particular times. If the economic opportunities are renewed frequently, then the business can grow and adapt to take advantage of them. This concept provides a framework for explaining many facets of business behavior accompanying the diffusion of Internet access technology.