Begs the question of which GPU’s are compromised and how far back. I ask this as I have access to many older GPU’S as well as older rigs starting with the XT.
The fact that you are using such an old GPU will stick out like a sore thumb: your computer will be unlike almost anything else out there. It would be like painting your car psychedelic purple and pink: when they see that, it will uniquely identify YOU. (No one else has a rig like it.)
It’s not a security compromise, it’s a technique to uniquely identify your computer from millions of others on the Internet.