Some pilots are happy to pay for a big watch that is less accurate than a $5 Casio. Others even pay £120k for their training. Some pay RYR to look at their CV, pay for interview and then pay to get a type rating and enter a contractor holding pool!
As soon as someone raises their head above the parapet for the benefit of fellow pilots by spending serious money on a valuable documentary and what do you do? Aw it's so expensive! Compared to 1% of your salary to the "bigger" union?
Commercial gain? Why bash something that potentially will do more for Pilots than BBC parliament in raising the issue to the public - once the press have it they can broadcast it and you'll still pay for BBC or Sky BSB.
So would you expect all documentaries by Charities or by the BBC to be free as well?
They all need funding - so why should film makers do it for free? Especially for "rich" pilots! (enter your airline salary here to see where you come out of 6 billion: Global Rich List
They have mouths to feed as much as anyone else!