I get the feeling that you misunderstand the gist of the article.

The gist of the article is not "I didn't know you were going to get rich off of my work (and I'm pissed off by that)". The premise is - in my reading -

"Don't point the finger at me for writing bad software in my own free time, when you didn't even consider contributing to it and don't try to shift the blame when you have to face the consequences of your own cheap behavior".

At least that's my interpretation.