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Assuming an average sms rate of $0.04, they have sent 1.5 billion messages a year. 2022 stats indicate Twitter had 396.5 Million users. So for the full picture

by Oras 4y ago

Assuming an average sms rate of $0.04, they have sent 1.5 billion messages a year. 2022 stats indicate Twitter had 396.5 Million users. So for the full picture, it would be around 5 messages per user per year, which I don’t see as a large number. This might be why it wasn’t unnoticed.

OJFord 4y ago
With your numbers (not checking) this would be 1.5B supposed new users requesting to sign up (or existing ones verify a new number I suppose) and then bouncing, every year. Which is a lot if you have 0.4B completed-signup users, and shouldn't go unnoticed.
- cptaj 4y ago
  Those are not the only times when 2FA happens. It happens every time you log in after closing a session. This could be multiple times a day for some users.
  - OJFord 4y ago
    Oh true. Still seems very high though. 5x every single day for every single user to log in having logged out since the last one and not 'trust[ed] this device'?
    - Oras 4y ago
      Every year not a day
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