Phone, Kindle, iPad, doesn't matter much to Amazon. The point is, you aren't going to pay $12/month for the Post. You could, but you won't. Instead, you're g

Phone, Kindle, iPad, doesn't matter much to Amazon. The point is, you aren't going to pay $12/month for the Post. You could, but you won't. Instead, you're going to start paying $79 a year for Prime, which'll get you access to the Post on any device you want. And also instant video, so you can drop netflix. And free fast shipping. And that will make it so easy to buy other things from Amazon that you will. Often. 1-click was brilliant, but that's just one part of their overall strategy to remove absolutely every obstacle they can that might possibly come between your intention to buy and the action of doing so.