1) wine is quite good these days. It has played far more than Source Engine games for like 5+ years. Ever since steam went to Linux and the Unity engine became popular, compatibility problems became much less common even on new games.
2) If you are always going to rank playing games as more important than spyware, then you're an easy mark. If you aren't willing to make a few sacrifices to invest in your future, then you're made your decision. Why do you care about spyware if games are more important?
The costs of leaving are only going to get worse with time. I recommend paying these costs now instead of waiting for the problem to get worse.
Linux gaming is getting better and better. Yes, we have a few sacrifices to make in the form of not getting to play every mainstream title, but many of the ones worth your time have great Linux versions, and if not, they might run well in Wine.
I wiped Windows nine months ago and installed Arch. The only things I missed were Dark Souls and Insurgency.
I found out a week ago that Dark Souls runs like butter in Wine, and Insurgency just got native Linux support the other day. I am a happy Linux gamer.
As for the titles that choose to avoid supporting my operating system, well I guess I won't be supporting them with my dollars.
The problem with wine in this case is that it currently can't work with anything using DX11/12, many (if not most) of the big name titles coming out on PC these days are unusable on wine because of that.
2 is actually a decent reason to try to change, given that Valve is trying to get more venders to SteamOS it might just be start to make a difference.
2) If you are always going to rank playing games as more important than spyware, then you're an easy mark. If you aren't willing to make a few sacrifices to invest in your future, then you're made your decision. Why do you care about spyware if games are more important?
The costs of leaving are only going to get worse with time. I recommend paying these costs now instead of waiting for the problem to get worse.