Yes, but what's the better alternative? The article makes the point that you're not even getting table scraps back into your GPL project. In most cases, the companies prefer a proprietary rewrite. Now you're just stuck with a less-developed project, while the world around you uses more-developed proprietary alternatives and pushes you to do the same. But I guess, that somehow makes you feel better because you don't let the corporations "feed off your work" and instead just waste everyone's time on infinite rewrites?