> Yes, it's okay for developers to invest their own time to develop something, and try to recover their costs by selling it. And it's also ok if they decide to

> Yes, it's okay for developers to invest their own time to develop something, and try to recover their costs by selling it. And it's also ok if they decide to keep it closed source, because probably no one would bother to help. Just vote with your money. If really nobody is interested in helping develop for it, I doubt many people would be willing to go out of their way to compile it from source to avoid paying for it too. As you yourself demonstrate, making money off of your development and making that same project open source aren't mutually exclusive - so why not make it open source?