Thats true but that service is called google adwords Google-analytics is a really in-depth statistics for websites and shows alot of imformation regarding how people got here what they searched on the search engine, what screen resolution what browers they use where they are from how long they stayed on the website and such I use it alot for my business very useful. There is so much information on there.
To be totally honest, I have never noticed the ads on here. I appreciate that they aren't the giant pop up type or even giant banners. The text is easily passed over and ignored. Just another goodness about bc I guess.