Violates Policy[ Edited ]
"The link you followed may have expired, or the page may only be visible to an audience you're not in."
Aside from that, I have never seen a FaceBook page promoted on AdWords, so there might be some un-written policy regarding that.
FB can be promoted, similar to Ebay, but usually expensive and not the typical user experience of a landing page for Search campaigns - so rarely promoted.
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