Bing and it's boosters have been touting their search engine results as better and more relevant than Google's. As it turns out, the reason for that, is because they are tracking all of Google's results without reporting that they are doing so.
Additionally, the article posted here is disingenuous. There is a difference between tracking general click tracking, and what bing is doing, which is scraping queries and click results. That is not a general browsing feature, this is a search engine specific feature, designed to benefit off of the results provided by others.