"It's compliemtary. It's not free." Words to *always* keep in mind.
It's the fact they use all that content (Like the stuff I'm generating now as it happens) for free.
Yet without it what is FaceBook?
Remember the inscription of the statue that reads "For I am Ozymandias, King of Kings. See my works and tremble" and all that's left is the feet?
Would it really take that much to turn FaceBook into the new MySpace? If a provider came along and paid for content?