> I never said they oppose each other.

Are you not implying below, with your words, that working exclusively on open source cannot bring money?

> If they exclusively work on open source stuff where are they getting money from to survive?

You seem to imply that open source is incompatible with making money. You seem to believe that if someone is making money they are not doing "exclusively open source" but something else in addition to open source.

> you need to follow the money trail. Money given to people who work on open source comes from non-open source places.

Money spent on coffee comes from non-coffee places, mostly. Does that mean one cannot make money exclusively selling coffee?

I get your point, it is very uncommon to live only of open source. That I can agree with. It is the exaggeration and dogmatism that is untrue.