Their Terms of Service (https://help.github.com/en/github/site-policy/github-terms-of-service https://help.github.com/en/github/site-policy/github-terms-o...) s

Their Terms of Service (https://help.github.com/en/github/site-policy/github-terms-of-service https://help.github.com/en/github/site-policy/github-terms-o...) say: One person or legal entity may maintain no more than one free Account (if you choose to control a machine account as well, that's fine, but it can only be used for running a machine).