You can migrate account but they will tell you that you need to move data on your own eg its better you open amazon.de drive with new email account and get 3 months free.
My suggestion would be to make that amazon.de acount add it to rclone as remote then get yourself cheap VPS on https://www.scaleway.com
Install Ubuntu 16.04 , wget latest rclone beta and copy your rclone config
make simple bash script
and put it in
This will make sure that script would be run every minute, but dont worry it wont allow to instances at same time.
IMPORTANT. Sync remote drives directly and not secret/crypt ones.
Once all your files are synced ( 3 days top's for 8TB ) just check the log, remove it from crontab and change the sync part with
/usr/bin/rclone check acdus: acdde: -v --log-file=/path/to log file/
Run it once and when its finished check the logs if all files are ok.
Now when you have everything synced open
rclone.conf find entry with
type = crypt and change
remote = acdde:/myencryptedfiles ( just the remote part if it was acd now change it to the new registered remote )
And thats it you don't need to change anything else.