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And if they get enough 'Like' buttons on pages all over the internet, they can correlate against your browsing history. If you suddenly start looking at lots of pages about vacuum cleaners, the intent becomes pretty obvious.



That's sub-optimal compared to what google can do.

You have to realize that FB have to increase the value of each user each quarter (currently 4USD per user)

But they have to do it with an advertising model that is only slightly better than tv ads.




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