Has anybody here tried to file a GDPR deletion request with Twitter?

It is pretty clear the article is talking about Australian subscribers.

In Australia.

According to the same company (Telsyte) Netflix had about 6 Million subscribers in 2021. So that would make about 3% losses in subscribers.

This kind of verification usually works by the user being visible on camera and holding their ID up to the camera, turning it in multiple directions to show its safety features.