<putting on tinfoil hat>
because Waves wants to know how you are using their plugins and if the music isn't good enough they can disable them or crash your computer because Chris Lord-Alge doesn't want his name associated with some bad music from hicksville USA and...
<taking off tinfoil hat>
Gee, that was fun. Now I can understand some of the posts I see better.
Honest answer, I'll bet Waves isn't really using WMI data. They likely purchased a framework to build Waves Central in that also contains WMI interfaces.
Dan