I’m experiencing this issue where I’m not receiving email communication from the project creators since my kickstarter account was created using the Apple ID alias feature. According to the article linked below, there isn’t a workaround through kickstarter and you have to contact the project creator directly to update email for any communication outside of the kickstarter platform.
Per the Kickstarter FAQ re Apple ID:
“Please note that the unique relay address tied to your Kickstarter account can only be used for communication with Kickstarter. This means that any communication sent outside of our platform by the creator will unfortunately not reach your inbox. In this case, we'd recommend reaching out to the project creator to clarify the situation and to request that they update your email on their end. “
It’s a bit of a pain, after I resolve some of the projects I’ve backed with this account, I plan on deleting it and starting again without the Apple alias this time.
https://help.kickstarter.com/hc/en-us/articles/360051735993-What-is-Sign-in-with-Apple-and-how-can-I-use-it-to-create-an-account-
