Do I sell my photos through a stock photo website? Sure. Is it my only form of income? No way!!! Do I make a lot from stock photography? No Way!!! But I also don’t dedicate much time to doing it. I know of people that this is all they day and they take hundreds and hundreds of stock photos. And some can make a living off of doing this, if not they can make a nice second income. I make a hundred or so dollars from stock photos every year. Its something.
Here’s a nice article that goes over what stock photography is and how it works. You may be interested.