If so how will it be possible? If you need RTX 3070 minimum for 15 accounts for CS:GO, and for CS2 you will need 2 separate pc's if the same method will be used.
Also, Valve might note this boosting and change the system as they did with the drops.
Also about the performance, if CS2 is 2x heavy, you'd most likely have to disable rendering, but I have no idea if it's possible with no injection.