Don't be so impolite, Ben.
My friend... WebFX is a place that Erik and Emil use as a repository of their creations. They sell commercial licenses of their Scripts, but in 98% of cases, the usage is for non-commercial purposes.
So, they don't have any obligation to stay here answering our questions, but they stay, because they're great guys.
For commercial usage, if you have it, you can said this. But you need to think that they don't survive of wind. They need to make money, and they work hard for it. Erik works about 16 hours a day to recieve an amount to live. Emil I really dunno.
It's not so easy as you expect. We're a comunity, and we help each other, if we can.
I'm not trying to be impolite with you, but I think that, if you don't pay, you can't stay shouting the authors. I don't know them in real life, but I know them on Web. They're great people and always share knowledge (sometimes a little bit late), but they do what they can.