Of course, but it is an extra step that isn't necessary assuming an OGL-like working ORC. It is probably trivial for a Kobold or ENP, but not so much for a small publisher working on a small product. The point -- or, my point, anyway -- is to create an environment where Open Gaming is easy and vibrant, with lots of cross pollination between creators and companies. I want to be able to write an adventure using a A5E monster that I modify to be even cooler and give it back to the Open Gaming community (just as an example).Sure, but your computer does. You put your SRD out under CC, not your book.