I'm not trying to enflame anything here, but there are government guidelines that define hobby and business. In ontario, there is a limit on how much money a person can make from their "hobby" before it becomes a "business". I believe it is around $2000 per year. Anything over that and you are supposed to claim it on your taxes... and you are no longer a "hobbiest". That said, you can still be a hobbiest while professionally practicing your trade.
...I'm sure a professional hockey player can still play a little street-hockey just for fun!
1.0 red tailed green ratsnakes, 2.3.16 North Mexican Pine snakes, 1.1 Bairds Rat snakes, 1.1 Amazon Tree Boas, 0.1 Trinket Rat snake, 1.1 Taiwan Beauty snake, 1.0 Western Hognose, 0,1 Wandering Garter Snake, 1.0 Russian ratsnake, 1.1 Crested Geckos