Using 'Sign in with X' with service Y means you're giving X, or anyone forcing X to abuse their position, full access to your account on Y. Additionally, anyth

Using 'Sign in with X' with service Y means you're giving X, or anyone forcing X to abuse their position, full access to your account on Y. Additionally, anything sent to you@privaterelay.appleid.com flows through an Apple server. You can trust Apple with this now, but it's not so easy to revoke that trust later. Still, it's useful for throwaway signups and garbage I suppose.