Many people turn their hobbies into a business operation. Not so much to make a living or make big profits, but more to help offset the costs of the hobby. Whenever you go to one of those community fairs, the vendors at the respective booths are mostly folks selling a product that is direct outcome of their hobby. The bands that play on stage, they make some money, but never enough to offset the cost of instruments, gear and transportation. But they enjoy entertaining folks and they hope someday they’ll get discovered.
A hobbyist is a person or entity conducting a hobby based business operation. Section 183 of the Internal Revenue Code provides the law in terms of tax compliance at the federal level for hobbies.