It's not against the rules because it isn't warez.
Its a freely distributed App, so it doesn't come under the scrutiny.
If it does change, and become a paid App from Amazon, then it becomes warez and you have to remove it. I don't think it will, because right now Amazon's got exclusivity over it. Plus, the games a bit like Temple Run, where you're encouraged to make "in-game purchases" to make revenue for the dev-company.
Thanks for the link, I tried for an hour to install Amazon AppStore, create a fake name, us address and credit card numer... to still get a "sorry not available in your country".
Should've used a vnc or something to "spoof" the isp to a USA one... but that would take too long for something not so important.
