 How does the photographer imagine photos with a CC license will be used?
Some photographers are almost medical, and are going after a perfect portrait. On the other hand, professional photographers usually have a subject whom they don’t know personally, so they end up having to try to capture an image that they’ve created based on who they think the person is or how they want that person to appear. By making these pictures available under a Creative Commons license, now they do. For one, I feel that “free” CC licensed photos have a much higher chance of not disappearing. We all know the Virgin Mobile case, where Virgin used CC licensed images in an advertisement without getting permission from the models, and got in trouble. Google has CC search in their advanced search.
 In textbooks and mainstream media articles.
 On billboards  In memes  In textbooks and mainstream media articles.  In TV commercials