Part of that could also be that Microsoft is much more willing to do things in order to avoid looking like a monopoly more than just forbidding the word monopoly. A lot of effort has been spent in bringing SQL Server to Linux as opposed to continuing to use it as a way to lock people into using Windows Server. That's not a charitable act mind you, but I doubt Microsoft under Balmer would have done it.

Disclaimer: I do work for Microsoft on SQL, but I am not in management nor do I speak in any capacity for Microsoft.