And it's really free

And it's really free?!

Yes. Once upon a time I had to deal with a company who sell flash charting components, their component had a bug that I needed fixing, so I emailed them about it asking when it'd be fixed.

Remember that I had paid real money for this software.

They were so incompetent, rude and obnoxious that after three or four weeks of emails I thought to myself "I could learn Flash and Actionscript and write my own charting component, release it as Open Source, host it on sourceforge and build up a community of helpful coders faster than they can fix a single bug."

And that is what I did. And that is why it is free. I guess the moral of the lesson is: don't piss off your customers.