Phishing or bribing an employee at a domain registrar. Phishing you to get your password and then bribing or social-engineering someone at the phone company to forward your SMS-based 2FA codes to them. Waiting for you to forget to renew your domain and then registering it.
It often surprises people what effort someone will go to to steal their identity.
Consider that you have a github account. You might be in the supply chain for a bit of code someone needs to read or backdoor to attack a company that you've never heard of. Github is a harder target though.
The scary ones are the real estate funds redirectors. They just need to be in your inbox for a little bit and boom, hundreds of thousands of $ gone because people don't take the time to re-verify bank account details by in person.
