It looks like that's missing data - including some very big ones. https://github.com/firecracker-microvm/firecracker https://github.com/firecracker-microvm/fire

It looks like that's missing data - including some very big ones. https://github.com/firecracker-microvm/firecracker https://github.com/firecracker-microvm/firecracker has quite a few stars and came out in 2018 - no mention. All three of them have contributed to the Linux kernel in significant fashions, and it's not listed for any of them, despite the 72k stars. And are github repos and stars the only way to measure open source contribution? The Xen project only has 162 stars, yet I don't think anyone would say it isn't an important project, and it's one Amazon has contributed to - if you're using a PV guest on Xen that's protected against Meltdown, chances are high you're using the Vixen mitigation that Amazon released. Could Amazon do more? Probably. I'm not trying to say they're perfect. But this idea that they don't contribute back to open source seems pretty flawed, even by the data in your link, which seems incomplete.