It's common in the blogging world that many bloggers end up making blogs as business machines. Good free blog let alone paid. And most internet businesses with blogs typically use business through advertising. Well, one of the most popular advertising business (PPC = Pay Par Click) in the world is Google adsense business, where to display its ads must use script or code language. But until this writing I launch, as far as I know wordpress.com can not accept it. Likewise with certain ad scripts.
