Blatant rip-off : OC4BA

After some attempts to write an interface between OC modules and PMDG airplanes which were not entirely successful mr. Kristensen then decided that his new version was perfect, immediately stopped support for the old one and charged no less then 45 dollars for his new attempt, advicing the people who protested (me) to get a hobby they can afford.
Now in my opinion this is a rip-off of the worst kind.

Rant over

Totally agree,
And don't forget that his interface is based on the software example from Kiek!
He made a nice programm, but making money over someone's example?
Hope he keeps in mind that the guys from PMDG dislike commercial apps without noticing them.

What am I missing here? Just write a better interface and give it away for free? Simple.