I disagree. Let's assume you're correct though. Open source altruism is a fantastic opportunity for greed. Especially when it comes to big companies. Doing good deeds for community projects drives the good will engine for your core business.

Let's say you're the maintainer of the `ls` command. Some Facebook employee comes along and fixes a bug, out of the goodness of his heart. You're going to think, wow, Facebook is helping me, now I trust Facebook more.

Problem is incentives. If Facebook gets large enough, its employees who are trying to stake a claim in open source might not be thinking about how that ties into the company as a whole, if leadership isn't rewarding it.