I'm trying to send LAT invite to my personal email address from companies developer account. I added Amazon Appstore permission in marketing communication settings on my both .com and .co.uk accounts (just in case).
Then I removed myself from tester list, deleted my tester record completely, added email again and added it to the tested list. Then I got an email that:
Number of opted-out addresses: 1 (These addresses have been opted-out of Amazon marketing communications)
Honestly guys, this Appstore LAT UX is just below any standards...