"If a business isn't making money, how is it growing and what is it growing? "
You can show a loss by ploughing profits back into capital equipment and replying on depreciation, but that strategy only works for so long.
The other thing to bear in mind is no matter what the share value is now, Amazon only got whatever they were worth when originally sold. Unless they've made new share issues (creating more debt), they've leveraged the losses by taking out loans (creating even more debt) based on the share value. That's voodoo economics at its finest.