The register article on this https://www.theregister.com/2021/02/11/microsoft_azure_ubunt... has responses from Canonical and MS, which shed a bit more light on the situation. The Canonical quote is the most illuminating :- "As per the Azure T&Cs, Microsoft shares with Canonical, the publisher of Ubuntu, the contact details of developers launching Ubuntu instances on Azure. These contact details are held in Canonical…
Great, so their conclusion is "we should make this less obvious and creepy", not "we should probably stop doing this".
I mean, is it even possible to buy an Oracle license without Oracle knowing who you are?