They run linux and use Vulkan for rendering, so this is a potentially large port burden to force on devs.

Potentially, but there's only one distro and only one set of hardware, so there's waaaay less QA than an actual Linux port.

Still, nobody ports to Stadium unless they're paid upfront.

Ah, always wonderful seeing a multi billion dollar company leverage OSS in an attempt to launch a negative sum product as an internal political promotion move only to kill it off a year later. Such shall be recorded in the history of the Net.

Google isn't the company I would lodge this complaint at. They contribute a lot of code back as well.

Google is a company large enough that you can always find fringes that contradict their main philosophies a business model within the same company. They do not contribute proportionally to their revenue nearly as much as the other FAANG companies.

Yes, they do some OSS work; some of it is even good quality; most of it is not, and is open sourced only to increase market grab (looking at you, Android). They are just a mess. We can all cherry pick counter examples, because of how messy they are.

AFAIK they run Linux, so porting games over isn't necessarily "free"