I found this article interesting purely based on the hypocrisy of Facebook being upset at user data being sold. It is alleged that this individual used virtual android devices to perform phone number enumeration scraping. He then assembled a database of user IDs and phone numbers which he put up for sale on a known marketplace for questionably obtained data. Facebook is now suing this person for violation of their terms of service. I guess Facebook is the only one that is allowed to sell their users information.
https://www.theregister.com/2021/10/25/facebook_sues_man_for_scraping/