Quick tip for anyone whos fighting on the license.
1. Forget about FlexNet. Its not that easy to crack after all
So me and some other folks running the vGPU_Unlock Discord server and Wiki have figured out how to bypass the license entirely with "x-pci" QEMU argument. I won't go into details for obvious reasons, but this completely throws away license requirements. Of course, if you want to use vGPU I highly recommend paying Nvidia for it, but yes there is a workaround. I may have posted the Discord link here, though if it isn't there, send me a message.
My suggestion will be get W7100, put bigger BIOS chip, flash S7150 bios, override PCI-ID in guest OS to allow AMD gpu driver to be installed.
If you have a bunch of S9150s lying around, what's the point of spending more money? The MxGPU technology on S7150 is not very advanced and Nvidia vGPU is better than it in many ways. My recommendation for Adam is to use them in standard passthrough mode, that way the cards don't go to waste. With 8 of those GPUs, I don't think GPU mediation is necessary anyways. These S9150s aren't very new, nor that great, but they can be used in a remote gaming or workstation setup I suppose.
Perhaps the best use of those cards is Folding At Home, where you can give unused compute power to help with scientific calculations that can benefit society.