The premise is simple: explain the difference between bill-by-the-hour and fixed-price-project and how they vary when growing a company from a single proprietor to a small number. I wish the article also addressed the OTHER huge difference: how the interaction with clients change when the billing switches between hourly and fixed-price. The change in incentives can destroy a company or drive its success, but either way, I believe this makes more difference than the compensation issues this article addresses.