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Just so I understand this correct, if everyone is only sharing things explicitly with friends or friends of friends, doesn't that render the open social graph search useless?

A lot of the information this searches can't actually be locked down by privacy settings anymore, as far as I can tell. Facebook made most profile information public for everyone whether they wanted that or not.

On the advertising side, I don't think it matters what the sharing settings are. We have been targeting on very specific parameters with quite a large reach for a while now.

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