Emails from companies already have a unsubscribe button. So if I unsubscribe they shouldn't send me emails. That is not changing with the new Apple Sign In feature. Emails will still have the unsubscribe feature. The only reason for devs to push for a real email is to sell it to advertisers. They are not deleting the email once I unsubscribe. So giving them an ankoymized email is good. I hope this succeeds.