CC photos are all free for non-commercial use, correct? What if you'd like to be compensated, but not at rates that justify the overhead of Getty Images? Many of the images I found were not CC licensed, nor did they have a Getty Images option. Those are the images I'm referring to.
e.g., go search Flickr for "drawdy falls". No results in Getty, no results in the Commons, but a handful of images from photographers that are retaining full copyright, but have't posted contact info. Maybe they don't want compensation and just failed to select CC when they posted. Who knows. Regardless, many of the images I found were in this middle ground. I'm not trying to sound entitled here, just pointing out that there's lots of images that sadly cannot be used.
e.g., go search Flickr for "drawdy falls". No results in Getty, no results in the Commons, but a handful of images from photographers that are retaining full copyright, but have't posted contact info. Maybe they don't want compensation and just failed to select CC when they posted. Who knows. Regardless, many of the images I found were in this middle ground. I'm not trying to sound entitled here, just pointing out that there's lots of images that sadly cannot be used.