I have verified that I can purchase products in the Amazon AppStore Live App Testing using the Unity SDK in version 6.9.3.
https://github.com/RevenueCat/purchases-unity#amazon-support
> This version of the SDK doesn't have support for Amazon Store. If you would like to use our SDK with Amazon Store, use the version tagged amazon-latest and follow the AMAZON-INSTRUCTIONS.md docs to get set up.
However, the GitHub readme says I need to use the version tagged "amazon-latest".
Is the information in the GitHub readme out of date?