You mean the Kindle Fire is being sold at a loss and Google is now also selling a tablet at a loss.
Meanwhile Apple will be selling a smaller tablet at a profit.
Which business model here does not work in the long run...
Google is not selling their tablet at a loss.
They are selling for a razor thin margin by choice. There's a big difference. It's obvious they do not have the pull that Apple does in the marketplace, therefore they are taking a bit of a gamble to build market share with a tablet of their own.
It may or may not work, but if not, it will not put Google out of business. Conversely if it does work they can always gradually increase it's price down the line. This is a proven, age old strategy.
The same thing can be said for Amazon. If one looks at how long Amazon has been a leader in their internet space, you would know they have profits to play with and hence they've decided to build a phone to sell more of their content. Again it may or may not work, but at least they are not afraid to try.
It's a huge market out there, one with plenty of room and an abundance of buyers for a variety of brands. If not, there would be a rapidly shrinking market for Android. The only other viable product at this very moment.
Competition is the backbone of free enterprise. That's a fact that's proven itself over and over for more than one hundred years. Nothing would be more destructive than to have an Apple monopoly with no other choices.
Make no mistake, I'm _NOT_ advocating for any company. Furthermore this post, is coming from someone that is a huge Apple enthusiast.
Yet one that understands business, and is not afraid of competition.
It's as simple as that
