Ugh, just what we need, another "pro" fractal renderer. Just search around, you can find plenty of non-free 2D ones, and it's not so easy to find a decent free 2D fractal renderer that does anything interesting, at least not last time I looked. I think it's one of those markets where you consistently find a small handful of people that are willing to pay, and the result is a net loss for the world at large, because fractals are cool but largely useless, and it's enough work to build something like this that people are reticent to give it away for free. So no, I don't think there's any real commercial potential there.