It's legitimately to stop spam. That might be what it originally started out as, but by now many platforms seem to think of it as just more personal data they

It's legitimately to stop spam. That might be what it originally started out as, but by now many platforms seem to think of it as just more personal data they can monetize [0] [1]. [0] 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... [1] https://www.engadget.com/2018/09/28/facebook-two-factor-phone-numbers-ads/ https://www.engadget.com/2018/09/28/facebook-two-factor-phon...