Open source it under GPL and sell exceptions as the copyright owner http://www.fsf.org/blogs/rms/selling-exceptions http://www.fsf.org/blogs/rms/selling-except

Open source it under GPL and sell exceptions as the copyright owner http://www.fsf.org/blogs/rms/selling-exceptions http://www.fsf.org/blogs/rms/selling-exceptions The benefit being that everything GPL touches also needs to be open sourced, unless you hold the magic multi-licence wand :)