Why do I control a subdomain of microsoft.com?
Let's start a project in the cloud
- Create webpage at cloud service (Azure, AWS, GCP).
- Redirect subdomain of your company domain to cloud service (e.g. CNAME).
Let's shutdown a project in the cloud
- Cancel webpage at cloud service (it costs money!)
- Forget about DNS entry (it's usually free)
- Hacker re-registers webpage at cloud service.
Don't have stale DNS entries laying around