If they raise prices then they invite an instant flood of competition and lose their monopoly. They have no power to raise prices and restrict competition. Their only competitive advantage is pricing. Amazon's only profitable products are AWS and its stock. The benefit of losing $2 billion a quarter doing retail is debatable. Would you prefer a world without amazon's subsidies given that they have no power to exploit anyone?
Your theory is that Amazon is spending $2 billion a quarter even though it gets them no long-term advantage?
If you're right, then capitalism is hopelessly bad at optimization and we should scrap it. But what I think is more likely here is that Amazon's execs understands the economics of their business way better than a zero-karma free-market fundamentalist whose pseudonym is a genitalia joke.
They get a long-term advantage in that their stock continues to rise. The stock is the product. And AWS enjoys having a household brand attached to it. And don't be mad that someone with a genitalia username is making a point your brain is incapable of making a cogent argument against, in spite of it eliciting a strong enough emotion for you to leave a comment.
Their stock will only rise if they eventually make more money. Meaning that investors expect them to be able to make that $8 billion/year up eventually. Presumably through pricing, because selling stuff at above-cost prices is where their money comes from.
Also, I only made fun of your username and your lack of karma because you were making absurd unevidenced claims like, "They have no power to raise prices and restrict competition." If you're going to say things like that, then it's not so much making a point as doing what Frankfurt calls bullshiting. [1] That combined with your very low karma suggests you're not really worth the time of a serious reply. Note the link in my bio: http://www.penny-arcade.com/comic/2004/03/19
And at least I don't resort ad hominem arguments. That's what happens when lower IQ individuals have nothing else to say and don't know how to deal with the cognitive dissonance that arises when truth clashes with their feelings. Feelings based on cartoons and TV shows that programmed you to viscerally react that way.
And what do you propose in place of capitalism? You sound like a child. Why would you want to force companies to make a profit on every product? There's something called a loss leader. How about just prohibiting all forms of charity? You make zero sense.