Their forum only permits sign-ups with Gmail and Outlook
I went to see if it was true because I found it hard to believe, but you are right. I don’t understand why it is like this, given the nature of the program and the whole philosophy behind it.
I guess that we can consider ourselves lucky that they don’t use Google’s CAPTCHA.
Tomorrow I will raise an issue on their repo, I want to see what is the official stance on all this bullshit.