We're implementing IAP at the moment and noticed one of the test cases performed by Amazon after submission is multiple Amazon users support. Our app is not linked to the currrent logged in Amazon user, but to the current logged in Facebook user. In other words, all in app purchases will be charged on the current Amazon user, but will belong to the currrent logged in Facebook user. Is this behavior acceptable by Amazon? Thank you
As you said, all Amazon IAP purchases on a device are charged to the Amazon account that the device is registered to. As an app developer, you have to ensure that the Amazon user who paid for IAP is entitled to it.