Yes, I also remember hearing about great photograhers earning great sums of money from stock when I was with Tony Stone Worldwide (later it became Getty) but I never met them; in those days, the sum being talked about was fifteen thousand pounds, if memory serves (70s - 80s) and going by my own returns it sounded wildly optimistic. And those days it was pretty well all RM. But who knows - perhaps people do make a fortune today, despite what may seem the reality of modern business. Thank God it doesn't really matter any more.
Rob C