Facebook doesn't sell data, and unless you think it's a bad thing for them to have an API then they don't distribute data either.
Of course they do, and they have for a while now. It's how they make money. In fact, they not only sell data they collect on your use of their service, they sell data based on information scraped by their persistent cookies as you browse other sites:
https://consumerist.com/2014/06/12/facebook-is-now-selling-y...