> Just very unclear who any of these services are for.

These services are for Microsoft, to serve Microsoft's business needs at the customer's expenses.

Look at Azure and how it designed it's products around the concept of accounts. Azure is supposed to be a cloud provider but their offering is built around charging customers for provisioning dedicated hardware that users then can run their apps on.

Even their function-as-a-service offer requires you to pay por the dedicated hardware where to deploy your event handlers.

If you look at Azure as Active Directory/Entra ID attracting and locking in enterprise accounts, you start to see these service account products as a way to price gouge customers. You have customers locked in with the auth system who then have to manage competing pressures such as "I need to keep my azure resources independent of other teams/projects" and "why do I need to pay 100$/month for a dedicated app service plan with two cores if all I want is a small internal app that might run the occasional background job"