He's commenting on the spirit of software released under permissive licenses lik...

He's commenting on the spirit of software released under permissive licenses like GPL.

By selling software built on the backs of free developers, you're effectively profiting off of a significant amount of their work.

I hope you donate a nice chunk of money to ffmpeg. https://ffmpeg.org/donations.html

10% of last month revenue was donated to FFmpeg. Thanks for clarifying