45% of Creative Pros are using free (CC0) content, as many as use microstock. Sites offering free content like Unsplash and Pexels have blown up in the last few years. Unsplash boasts 1.7 Billion API requests/mo. Pexels has over 500K free photos and artists are uploading 50K images/mo. What is happening? What are the legal issues? Why the emergence of free and how do artists and agencies benefit?