If I understand what Kyle Baxter is saying, Google is the Internet equivalent of radio and television.  The services (or content) is free because the advertisers pay for it.

Google builds services like Google Maps, Gmail and Docs and gives them away for free not because they have a philosophical belief that web applications should be free, but rather because giving them away for free gives them a competitive advantage. Free services, running Google ads, are obviously advantageous because free means more people will use them than if they charged and thus they can realize greater advertising revenues.