The CMP cards was dead on arrival in my opinion. I never saw a real usecase - i mean they cost so much and you get no benefits from this extra cost.
It was pretty obvious when they were anounced. In the middle of a supply crunch where did they find all these chips to build them?
Obviously they were picking through their garbage. It's not the first time they've used miners to unload their junk by branding it as "mining GPUs".