There are plenty a lot of tracking websites out there but three continue to rank higher than the rest. Google is #1 and continues to grow as Google + climbs the ladder of success. Facebook Social Plugins is the second best. Twitter, ranks as a close third to the aforementioned.
But what about the new Do Not Track initiative? How do companies like Google, Facebook, and Twitter continue to allow tracking while supporting the Do Not Track policy? Turns out it doesn’t affect business the way so many feared. In fact, there are more important things to worry about when it comes to privacy and here is a good article by PC World: The 5 biggest online privacy threats of 2013.