How Do They Track You? Let Us Count the Ways - Bits - Technology - New York Times Blog

When all these data collection events are combined for users in the United States in December 2007, Yahoo had the potential to gather data, through 400 billion events in the month. Time Warner, which includes AOL, was second, with about 100 billion events. Google was not too far behind with 91 billion. Interestingly, Microsoft, with 51 billion events in December is far behind not only the other big Internet companies, but also the News Corporation’s Fox Interactive Media, which owns MySpace.