If you can write a prototype software in just a few person years that is enough to launch a major business, yet you can't generate more value by being the expe

If you can write a prototype software in just a few person years that is enough to launch a major business, yet you can't generate more value by being the expert hosts/consultants on it, you are a rare breed. Who writes a small piece of software that changes the world yet do anything else to build commercial value on top of it?