Considering that some bot operators [1] and spammers [2] on Twitter are willing to pay the $8 a month for fake verification, I don't expect a $1 sign-up fee to be very effective.

[1] https://techcrunch.com/2024/01/10/it-sure-looks-like-x-twitt...

[2] https://techcrunch.com/2023/07/13/twitter-admits-to-having-a...