[Varstahl]

Is there anyway to stop this? It's kind of annoying ;-)

It's definitely possible but I wouldn't hold my breath for the implementation, time's short recently.
 

I am using this to playback:
plugin://plugin.video.amazon-test/?asin=*********&mode=PlayVideo&adult=0&name=none&trailer=0&selbitrate=0

So my question really is: is there any way to call the GTI instead of ASIN when calling it like this?

If you're outside of DE/JP/UK/US, then in the asin parameter you actually need to pass the GTI. Inside DE/JP/UK/US ASIN is actually ASIN, so GTI won't work (afaik).