Their other purpose is "dont be evil". There may be some debate about that at times, but they certainly aren't going to screw their customers. They know that their customer base would evaporate pretty quickly if they tried to screw them.

>I feel so tempted to laught at your face right now.

I wouldn't recommend it.

>Google's customers are advertizers, not common people.

Their users are also their customers. Without users there are no advertisers.

>Their users are also their customers

We dissagree.