The bulk of your complaint is about an Amazon limitation that we have no control over. When customers purchase the pro version if they find they are unable to use the product advertising API and they want a refund, we provide it. I’m not sure what happened in your specific case perhaps you bought well before they made the API change. Not having a US account is irrelevant. We have users that just use Amazon UK for instance. If you want to reply to your old ticket, I’ll personally assist if I am able, but if you aren’t successfully driving sales as an Amazon affiliate they won’t let you use the API.
My main point here is that a 1-star review with the first thing you cited in your review as Amazon limiting their API is completely unfair because it is.
I already commented re: AMP
In any case, I wish you the best. If you still want help, I will give it.