I am laughing in this thread. I actually have created and run profitable small businesses, for many years. I also have worked in both mid-size and Fortune 50 companies for years. All employ very different business models. One thing is in common - none stay in business, or attract shareholders, without showing profitability.

If you are operating your small business at a deficit for more than 3 years, the IRS does not consider you a business, but rather a hobby.
Business or Hobby? Answer Has Implications for Deductions

Now, there are some ways that you can get around it, but that generally means that you have an asset that is depreciating at a faster rate than the revenue that you are bringing in. The IRS does not consider normal daily operations to be in the same category as a depreciating asset.

Now, in the case of FB and Amazon, they had high revenue and a substantial number of employees, and they could show gradual reduction of deficit spending with a realistic profit motive. Additionally, they could prove that they had no other source of income, and had venture capitalists backing the corporation. They were/are in a different class than a small business entity.