I am an amateur photographer who since a couple of years undertook the stock photography route. That rewarded me with a small sum which is not something one could live upon, or something that would repay all the photographic expense. I see it in another way: I take photograph for passion, and would have spent that time and that money anyway. Stock photography allowed me to stay more "focused" and somehow to enjoy photography even more. Besides, selling one's work is a satisfaction even if one does not get "even" with costs. I recently begun trying to sell some images as fine art through internet. Again I don't expect from this an income, but a form of more general "reward".