Previously, OpenAI asserted they owned the generated images, so the new licensing is a shift in that aspect. GPT-3 also has a "you own the content" clause as well.
Of course, that clause won't deter a third party from filing a lawsuit against you if you commercialize a generated image too close to something realistic, as the copyrights of AI generated content still hasn't been legally tested.
Of course, that clause won't deter a third party from filing a lawsuit against you if you commercialize a generated image too close to something realistic, as the copyrights of AI generated content still hasn't been legally tested.