Nobody's saying it's impossible — just that like many other possible sources of revenue, such as lottery tickets, it isn't very dependable. If you're able to get 200 million pageviews a day, all sorts of avenues for making money are open to you. For most prospective businesses, though, "I will get 200 million pageviews a day and be able to maintain it practically by myself" is not a very safe assumption to make.

Not sure your point, I make my income from advertising (well company does and pays me, same thing right?) my fascination was with the single employee part.

Oh definitely. I was just pointing out that it's a very viable model for anyone here to copy, contrary to the advice of most here.