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.
LLM summary: "Steward-ownership is a model where a company’s control stays with long-term stewards (founders, employees, or a mission-aligned foundation) while profits are limited and the company cannot be sold for private gain. The goal is to protect the mission permanently."
The key, if I understand properly, is that these company cannot be sold (not even by the founders), so there is no "shareholder value" per se to maximize. It is also probably not a good way for founders to maximize their net worth, which is probably why it's not more popular...
If the company makes a profit and there aren't shareholders there to keep the stewards in check, excesses can and do develop.