If there were any signs to suggest that Facebook is building a monopoly over U.S. social networking, the latest statistics published by Hitwise paint a grim picture for Facebook’s competitors. Facebook increased its U.S. market share from 55.15 percent in August to 58.59 percent in September. Where did the majority of that share come from? Myspace, not surprisingly.
It’s also becoming clear that Facebook is expanding it’s demographic base to those that are over 55, up 108 percent in the past year. While MySpace has more time spent on the site than Facebook, Facebook will most likely surpass MySpace in…