Well, twitter did: https://techcrunch.com/2019/10/08/twitter-admits-it-used-two-factor-phone-numbers-and-emails-for-targeted-advertising/ https://techcrunch.com

Well, twitter did: https://techcrunch.com/2019/10/08/twitter-admits-it-used-two-factor-phone-numbers-and-emails-for-targeted-advertising/ https://techcrunch.com/2019/10/08/twitter-admits-it-used-two...