Someone felt that, even at this price, they would be able to profit from my work. Above that, what other justification could there possibly be? Or, if you are

Someone felt that, even at this price, they would be able to profit from my work. Above that, what other justification could there possibly be? Or, if you are an entrepreneur, your earnings are derived from organizing and selling the work of others. Again, what other justification exists, apart from "this many people wanted to pay me this price, those guys said they would do it for me at a smaller price, and I kept the difference."