The HL3 memes don't even seem fair to use anymore. I don't even want to un-seriously make joke fun of them at this point. They are just genuinely doing so much for the community.
But overall Valve just seems straightforwardly less shitty towards the consumer than other major companies in their space, by a long shot.
Valve pushing for Linux gaming is for survival, not charity.
Windows is closing in on them: stricter kernel access (tougher time for anti-cheat)
Encouraging users to use the app store, or more accurately: discouraging users to install from binary
They threaten Valve's business model, and Valve is responding with proton & SteamOS
That contrasts against the companies doing things that are good for business (at least short term) and bad for consumers.
It's like AMD open sourcing FSR or Meta open sourcing Llama. The outcome itself is good, but if they ever become leaders in these verticals, they will pivot to closed source quicker than you can blink, because the reason they're doing it is just coincidental to the public good, not because of a genuine motivation to do good.
So they may pivot to closed source when the circumstances will benefit it, or they may actually not do that. They have no shareholders that force them to squeeze the bottom line. The perceived benefits may just be slight and their culture will push them to stay the course on the long term, where other companies will do the reverse. Maybe if their survival is at stake, but wouldn't anyone faced with existential danger do anything to stay alive, including the worst imaginable?
Within certain commercial boundaries that keeps the business profitable, companies can and do make all sorts of decisions based on values and visions that are more than just economical, especially companies not beholden to shareholders that only care about short-term profits. Even the economical decisions aren't purely rational and often done from some kind of cultural bias.