[jordanwallwork]

Seems like it would make a lot of sense for them to offer both options; either would discourage bots, and you'd give people the choice whether to go the free route or the privacy-conscious route

[hombre_fatal]

Surely a phone number is no more identifying than a credit card payment in the age of KYC.

And accepting a cryptocurrency would probably have little impact on all the lucrative scams that get spammed around Twitter.