Very possible, from the in repo documentation (which credits Spegel yet again) https://github.com/Azure/peerd/blob/main/docs/design.md it seems like there was a particular engineer at Microsoft who was working on Azure Container Registry who found it useful to integrate Azure Container Registry.
If they contributed it upstream, would we be discussing a blog post "how dare evil megacorp submit a PR that only implements their API! embrace extend extinguish!"? Probably.
> If they contributed it upstream, would we be discussing a blog post "how dare evil megacorp submit a PR that only implements their API! embrace extend extinguish!"? Probably.
Considering how often that happens VS how little times stories like that appear on the frontpage of HN, I'd wager a guess that we wouldn't be discussing it like we're discussing the current license violation.
If they contributed it upstream, would we be discussing a blog post "how dare evil megacorp submit a PR that only implements their API! embrace extend extinguish!"? Probably.