To get paid from in-app purchases in your games, you need to setup payment profile in Amazon Developer Console.
- Select that you plan to monetize your games by selling in-app items
- Submit your bank country and your payment details (how you will receive money)
The next step is to submit TAS IDENTITY
It is a small questionnaire that you will complete in 2 minutes!
When you submit the form, you will see that status is COMPETED
That is DONE! Now Amazon AppStore will make a payment to you for all your selling items in the games!