As of 2007, 99% of Google’s revenues are derived from advertising (Google, 2008). However, no single account contributes more than 3% to net revenue, and less than 5% of the revenue is generated by any given network partner site (Google Inc., 2007). This means that no single buyer has a controlling interest. In Google’s system many advertisers bid on keywords. Popular keywords like “Dallas Texas” are sold for much higher value-per-clickthrough than obscure topics (Google, 2008). This distributed approach allows Google to attract both large companies and small “mom-and-pop shops” keeping buyer power low.