Good thing most servers use Linux and other open source software. I actually read something recently that Microsoft almost got in trouble during the antitrust days for trying to sell Windows licenses "per processor." They seem to be doing exactly that. I guess they've gotten bolder since the governments stopped monitoring them closely.
The rules are different depending on whether you have a dominant market position or not. Microsoft clearly does not have a dominant market position on server hardware, so they can use "creative" licensing there.
