So in other words, Microsoft stole Linus' ideas, and then asked everyone to pay them for it. At least going by Microsoft's own logic in general.
Frankly, I've always thought it's ridiculous that FAT isn't at the very least a FRAND patent, considering how much monopolistic power Microsoft had in the desktop OS space, and I'm surprised that in the anti-trust lawsuits against them, this wasn't raised as an issue. I guess back then they didn't really enforce FAT patents the way they started doing after Android took off, and saw it as an excellent opportunity for rent-seeking.