By seeing what ads a user clicked on, an advertiser could tell something about a user's interests.

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Seeing the differences between the two approaches, we realized we were on to something.

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And that is something that I have worked on all my life and we are seeing in this campaign.

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What we're seeing now -- Anthem Blue Cross and others -- is something on an exponential magnitude of what we had seen in the past, even in that increase.

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Seeing the strain he was putting on himself and his family depressed Kirimoto, and by Christmas of 2010, something snapped.

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