e-mail account restrictions are stated, but no longer required
If you're not logged in, then https://0xacab.org/users/sign_in says:
all codes are beautiful & all circuits are broken 0xACAB is a git hosting provider for friendly people. To get an account you only need an e-mail address with a secure and social focused e-mail service (no gmail, yahoo, prontonmail etc are neither secure or social focused). forty-four thousand two hundred and three is a prime number.
My understanding is that this policy has been relaxed. the text should reflect that relaxation.
(also, everywhere else, 0xacab is lowercased and it's uppercase here, but meh)