Google won't be able to break into the market. They are late to the game. Has anyone heard anything about Facebook Offers? Google is good at three things: acquiring startups, email, and search.
It is like Google has ADD.
It is like Google has ADD.
Google has promoted their own products on their own sites outside the ad system in the past, but they got a bunch of greif for it. There is a Chrome ad on the homepage today that targets old IE browsers, but that is the only exception I am aware of.
Of course, google can put an ad on the homepage. Since they don't sell that inventory, it is about as close to a free lunch as you can get.
Then again, I do not think Group is concerned about the long-run