please help (Why is quantcast worth / need 50mm?) - we have all seen the webpages that appear in search engines for obscure webpages - we click through, since

please help (Why is quantcast worth / need 50mm?) - we have all seen the webpages that appear in search engines for obscure webpages - we click through, since when they show they are the only thing worthy of a click; we find that the sites gets .9k hits a month and 53% of those were female; then we are ask "Want us to quantifie your site?" and even though we get 10-20k uniques a day we can't really understand why we would want to know these numbers.... --- What do they do? What is their business model? and why the 50mm? ---