Microsoft’s Windows Live Spaces social networking/blogging service may have some international popularity, but in the U.S. it’s pretty much nonexistent. According to Hitwise, a competitive intelligence company, MySpace ruled the social networking category in April with an 80 percent market share. Facebook had 11.5 percent, and everyone else had about a 1 percent share or less.
Spaces doesn’t make the top 10 list. The Microsoft service ranked 16th with .15 percent of visits.