Yeah, how hard can it be to field a successful mobile platform with global software delivery and integrated payments. Maybe Amazon should have... Oh... right, they tried and failed with Fire phones.

I have no idea if the cut is 30%, but that's the same cut that Amazon takes from an author when they sell a Kindle eBook (and sometimes that goes as high as 70%). What on earth did Amazon do to earn that much of an author's sale...

I have little sympathy for Amazon, the largest retailer in the world, trying to play in someone else's playground. You can buy directly from your Kindle if you really have to have that browse-and-buy experience, but the iPhone app really is more convenient, isn't it?