I just found out that my #Github account was locked because I used a #SimpleLogin alias:
Our abuse detecting systems flagged your account because of the email address on the account. Before we can remove the flag we need you to add and verify a personal, non-disposable, non-aliased email address.
We'll also need you to remove the current email address from your account.
Let us know when you've completed these steps and we'll be happy to review your account status again.