It seems like Stack Overflow is a company that has figured out a way to profit of the Hacker Ethos of helping people. I guess if you concentrate enough naive volunteers in one space, you can sell their time to someone else.
This is happening a lot lately in Open Source and Tech. Just two examples: Wikimedia's endowment is reaching over 100 million dollars. AWS is making a huge amount of revenue of Redis.
Is there a point when the hacker ethos needs to become more broad? At the very least, we should be considering where we spend our time and for who.