When you say that it would "almost be like a punishment for Linux users", I think you're wrong, because it literally would be a value add. There is something interesting about the fact that offering you 10% more value would be taken as a downgrade

What is the value add of letting Linux players play multiplayer, and all the cheaters for that particular game is concentrated on the Linux servers so Linux players end up playing with the cheaters, and the Windows players get cheat-free servers?