Or the different paths to being a "professional photographer."

I think there is a decent understanding of the traditional approach - weddings, specific product images, specific events, and perhaps some understanding of paparazzi.

What I don't have any understanding of, and have some curiosity of, the taking pics for the "Stock Image" trade - no particular purpose, just a bunch o pics that then get "dealt" to the likes of Getty etc.

Could/would anyone care to opine or provide insight?

Thanks

Mike