If your IP (and possible your browser) looks “suspicious” or has been used by other users before, you need to add additional information for registration on gitlab.com, which includes your mobile phone number and possibly credit card information. Since it is not possible to contribute or even report issues on open source projects without doing so, I do not think any open source project should use this service until they change that.
Screenshot: https://i.ibb.co/XsfcfHf/gitlab.png
Because greedy investors are gullible and want to make money from the jobs they think AI will displace. They don’t know that this shit doesn’t work like they’ve been promised. The C-levels at Gitlab want their money (gotta love publicly traded companies), and nobody is listening to the devs who are shouting that AI is great at writing security vulnerabilities or just like, totally nonfunctioning code.