https://www.propublica.org/article/facebook-doesnt-tell-user...
Sometimes it comes as part of an acquisition. https://www.cnet.com/news/facebooks-latest-mobile-acquisitio...
https://www.titlemax.com/discovery-center/lifestyle/everythi...
As everyone knows, they also give data away. https://www.fastcompany.com/40554491/zuckerberg-keeps-insist... https://www.cnet.com/news/politics/zuckerberg-facebook-data-... https://www.cnbc.com/2019/04/16/facebooks-zuckerberg-mulled-...
https://www.nytimes.com/2018/03/19/technology/facebook-data-... https://www.cnbc.com/2018/06/04/facebook-reportedly-gave-per...
https://www.theverge.com/2018/6/8/17435764/facebook-data-sha...
Using to term "sell" to describe these data transfers to other parties is ineffective. Prohibiting the "sale" of data will not stop social media companies from transferring data to others.