Confirmed, Amazon writes:
I understand that you'd like to know how to access Amazon Drive as the access for Rclone to access Amazon Drive has been disabled.
Steve, we will not be re-enabling access to Amazon Drive from Rclone because at this time, the Amazon Drive's invitation period for new third party apps has ended.
** As an alternative you can try the following third party Cloud Drive applications if you are using Linux system :
I can certainly realize that this is not what you expected, but I hope you understand that this was never intentional from our end.
--- and they offered me a $5 gift card.
I've got almost a Tb up there with rlclone. Big problem for me...