Ability to access alias email address for Amazon customers, without this it is not really possible to ship outside of the UK, any courier attempting to send a notification to request duty etc would never reach the customer.
I would be very surprised if any of CL customers are shipping outside of the EU via Amazon without this (although more than happy to discuss work arounds if you are aware of any other than sending everything DDP)
Happy to provide some numbers on projected revenue as a result of this change if required.