I am just saying, if the concern is about putting your email on another service, then don’t put your email. You can use a throwaway one if you just want to get through it and play, or if it’s a matter of principle and you don’t want to, that’s cool too.
Just offering my 2 cents on keeping personal information safe on the web. It’s often unsafe to put all your eggs in one basket and email is no exception, so having some “burner accounts” on hand can help.