That is correct. But since I'm in the business of selling my source code, I don't find that problematic. Actually, it kind of helps me that my customers know th

That is correct. But since I'm in the business of selling my source code, I don't find that problematic. Actually, it kind of helps me that my customers know that the engine is not free. I need access to the source code to understand hidden magic and fix bugs, but I don't need a license that would allow me to redistribute the modified source code.