that seemed weird that they wouldn't just use that, but the facebook platform policies don't seem too keen on that kind of use (which makes more sense than your post, considering the legal claims facebook has made in the past against harvesters of their data, but I could still be wrong).
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Because Google is too proud to use the simple AJAX API that Facebook provides to do so.
https://developers.facebook.com/tools/explorer/?method=GET&#...
that seemed weird that they wouldn't just use that, but the facebook platform policies don't seem too keen on that kind of use (which makes more sense than your post, considering the legal claims facebook has made in the past against harvesters of their data, but I could still be wrong).
https://developers.facebook.com/policy/
Is this how those facebook -> google+ exporters are working, though?