Haha then you can expect advertisements on all your applications. XD
Well for the kind of innovations they have put out, I guess it is ok for free-lancer or "retail" developers like me.
Of cuz for organization that want more control over those advertisement they can pay monies for Google to stop that.
It is a win-win strategy for Google. On one hand, they attract lots of "retail" developers who can help to promote those technologies to their employers who in turn finally decide to use it pay some monies to Google to use.