this kind of mindset prevents many people from open sourcing their projects. "why give it away for free when you can monetize the closed source version?" I personally have donated to several open source projects but I know it's nothing compared to the price I've had to pay for closed source ones.
"Why give it away for free when I don't want to give it away for free" seems a pretty good mindset to prevent someone who doesn't want to give things away for free from doing so by mistake and regretting it later.