The Cole's Notes version, in my opinion is: It sucks! The ever-present cell-phone and huge repositories of dirt-cheap stock images mean that there are fewer opportunities than ever before, and when you add to the mix the ability of anyone with a couple of hundred dollars and a facebook page to be a 'pro'...
Not only a 'pro', but also anybody who has a Facebook page is ALSO a "publisher", to quote the representative from Getty Images. Woo-hoo! I is a publisher! I is a publisher! Gawd, I feel like,like, well, like such a tycoon! My own publishing empire!!!
Yeah, the Getty Images free embed program, with advertising possible, and all--it's going to change things somewhat I think.
My take is, if you want to make money, you'll need to sell directly to "real people", selling custom-crafted images. Stock is flooded with low-cost images and 39-cent downloads, with you receiving maybe seven cents per 'sale', if a seven-cent transaction can be considered a 'sale'. So, yeah, selling stock...that's a dead-end for most people, unless they really go all-out and create a lot of REALLY EXCELLENT, and highly-desired types of images. ALl the old postcard images?? Useless, worthless. Zillions of shots of every single tourist area in the entire world are available, cheap.
Some people are making money in photography, yes, but you'll need a good plan and solid procedures, products, services, and business practices. The new low-end is images on disc...which is what it is...you can find out what's being sold in your area by looking around Craigslist for a few weeks. "The phone book" and "the yellow pages" are no longer what they used to be--nearing dead, vanished, archaic.
If you can differentiate your business and your photo services, and differentiate them from the images of the great, unwashed masses, you might have a shot.