From my personal exchanges with people on Twitter on various contributions to projects in the Kubernetes ecosystem, I have frequently seen that some AWS employees (and sometimes the companies they partner with) want to make it seem like AWS is _really_ doing open source with real contributions. Every time I pointed my finger and asked, I got a response from such people "you should know not all contributions to the open source are code".
I'm not gatekeeping what "real contributions" are: You can fund development of OSS, you can provide Project Manager support, you can publicize and organize events (for the sake of the tech; not sales), do DevRel for something, provide UX/UXR/design support etc. They're all real contributions.
But for some reason, AWS contributions to 3rd party OSS projects stops right at "it works fine on AWS". It's kind of a meme at this point.
Disclaimer: I work at GCP on Kubernetes/OSS.