Not surprising at all. There are no incentives for anyone to contribute. And why would there be in this financial system?
If you like PHP, you might want to contribute. I like tmux, for instance, and I contributed code to them. I did the same for Sysdig, and a couple other projects.
Non-greedy action is by definion an action that doesn't directly and materially benefit the one acting. That is universal across all political and I would argue all biological systems.