[La1n]

>So it comes down to a purely emotional response to someone else making money off something you made.

Exactly, as I said, the material situation is the same. But we all are emotional beings, you would do certain things for your family you wouldn't for strangers. I don't think this case is any different.

I personally don't work for free for a company, but I do charity work for free. Working for a company in the time I work for a charity would "cost me absolutely nothing" if I already spend the time anyway, but everyone understands the difference.