I doubt it was directly Amiga that MS even noticed. I recall back in those days MS having a general policy in precventing the companies that got special pricing on the OS from sellign any hardware with another OS. the "stick"they used was that special pricing threatening to pull that meaning the maker would add hundreds to the price of their computers compared to competitors who were still getting the OEM prcing for Windows.
To this day there are still people in the collective Amiga community who believe MS and Apple are "out to get" OS4.
