The data was likely harvested in using a vulnerability in Twitter's API that allowed users to input an email/phone number and retrieve the associated Twitter ID. Twitter confirmed the vulnerability was patched in January 2022, but the scraped data has circulated in various "Collections" ever since.
The filename is associated with a massive data leak involving public Twitter (now X) profile information. 📂 Nature of the Content Twitter Collection 2022 Extra.zip
This collection is widely considered a rather than a "content" library. The data was likely harvested in using a