FYI, it reports as a tracker in Ghostery. Which is, thankfully, able to block it from tracking your personal details.
I recommend everyone use a browser add-on like Ghostery, Remove It Permanently, or another of that type, to kill these "helpful" additions that end up exploiting you across various webpages. Unfortunately it looks like mobile users are screwed.
I thought
@Joe Bryant had a policy against these things. I guess times have changed. It's a free site, so, the old axiom must be true,
we are the product being sold.