Twitter is considering forcing users to share more data, which can then be sold to advertisers,
This includes sharing user locations and phone numbers for targeted ads, even though the latter is necessary for two-factor authentication.
https://www.businessinsider.com/twitter-plans-to-force-users-to-share-data-with-advertisers-2022-12
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you can set up twitter 2fa using an app then delete/remove any phone number