I'm waiting for the day my Linux browser agent string pays off. So far, I've only seen random sites refusing to work for no good reason.
The price paid by Linux users was almost certainly bumped up by Linux gamers explicitly trying to support game studios who supported Linux.
You wouldn't see the same thing with hotel rooms or most other products that weren't intimately tied to the OS itself.
This is presumably partly because customers appreciate that game studios see their chosen OS as a viable release target.