Earlier quoted context omitted.
Nice of them to cause confusion to make phoning easier. No, corp.paypal.com/news or PayPal.com/corp/newsroom etc weren’t a good idea. I’d love to hear how decisions like this get made.
This approach (using a separate domain for content that isn't part of their service itself) has security advantages-- for example, this way a compromise of their news site CMS can't expose users' PayPal session tokens. It's decently common for websites to do this-- this is the same reason why Github Pages is hosted at github.io rather than github.com, and why static blobs are at githubusercontent.com. Those have a so…
From a practical sense, what different does a subdomain and a dedicated domain offer if you're managing your certs correctly?