Consider the following scenario:
Unlike FB, Google does have inherent advertising value. I want to buy a widget, I search Google, and Google returns hits, along with paid advertising that concerns widgets. Google does not depend so much on personal information from me in order to do this. I generally do not mmind this, as I am looking for widgets anyway. 'Course, I do limit the amount of information that I allow Google to gather about me - as a security precaution ...
Conversely, all FB has is personal information. It will have to develop algorithms to create "best guess" probabilties that I do or do not want a widget - based on the information in my account. It will then sell my information to its advertising clients - without any input from me.
If I start getting spammed on FB by advertisers for products I don't want - then I am going to limit the information that I want given out, or drop FB all together. As a result, advertisers are going to drop FB [ala GM] since they see no upside to it. No advertising - no bucks ...
I figured something was the matter - when I click on my Fakebook tab I get a blank screen.