Accounts are automatically subscribed to chip emails when linking they are linked via facebook. They will be sent to the linked primary email address that is on the linked facebook account.
 
If you previously unsubscribed and would like to resubscribe, are linked through AppleID and would like to subscribe, or you'd like change the email address where you receive your chip emails, please contact our Support Team. Make sure you provide your email address in your message and they'll be happy to assist.