I did this with a "Fujitsu-Siemens Scaleo Windows Home Server" some 14 years ago and managed to get the licence fee ($60) back from Microsoft after sending them

I did this with a "Fujitsu-Siemens Scaleo Windows Home Server" some 14 years ago and managed to get the licence fee ($60) back from Microsoft after sending them a bunch of stickers, manuals and assorted included Windows-related guff. I had to hammer them a bit but after a letter or three they gave in. I don't know where you live but if it is somewhere within the EU it could be worth trying this. I have no idea whether such an attempt could succeed in the USA without taking them to some court or other.