I think you are right. If Google thought even a small minority of people would subscribe to it, too small to make a dent in revenue, Google should do it if it i

I think you are right. If Google thought even a small minority of people would subscribe to it, too small to make a dent in revenue, Google should do it if it is enough to show advertisers that "inventory" is limited and to use it as a bargaining chip. I am sure companies like WPP are pressuring Google even today to open up more and share all kinds of data with them. It is not in Google's best interest to do so but how do you fend off attacks like the adpocalypse if you can't show advertisers that you don't need them as much as they need you? Edit: spelling