Social Media Must-see video shows the amazing reach of Facebook For instance, the short video says that 71 percent of U.S. Web users are on Facebook. By Michael SebastianFeb. 24, 2011 SHARE To read the full story, log in. Become a Ragan Insider member to read this article and all other archived content. Sign up today Already a member? Log in here. Learn more about Ragan Insider.