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...says the company that keeps their search engine ranking algorithms secret.

...says the company that does not even share how much % of their adsense revenue goes to advertisers.

In short: Both companies guard what they consider important for their success.

What does their lack of transparency have to do with portability? Google is accusing facebook of holding users' data hostage. Both facebook and Google keep lots of aspects of their business private for competitive advantage. Locking users in and intentionally making it as difficult as possible for them to try competitors is a crappy thing for facebook to do, and Google scores a legitimate advantage by doing the opposite.

Google do share the percentage of advertising revenue that they give to publishers: http://adsense.blogspot.com/2010/05/adsense-revenue-share.ht...

(It’s 68% for AdSense for content, and 51% for Adsense for search.)

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