I remember when Snapgrafx was given away for free. It was an excellent object-based vector flow-charting package. I couldn't believe how such a good product could be free, but it was all a part of development plans for a commercial package. I'm not even sure if that ever made it to being a succesful product.
I've just come from the Serif Forum. PP10 has just been released. People are whinging because they are charging £99.99 for the full package and £49.99 for the upgrade. Serif used to practically give their stuff away. £9.95 plust P&P was all one usually paid.
Now they have a market share, it would be commercial suicide to keep selling what is a sophisticated product for those prices. £100 is still a lot cheaper than InDesign or Quark Express.
Make hay while the sun shines, and make bread when it's raining.