IMO it would be better if there was a general mechanism to prevent profiting from corrupt business practices. For example, a court could determine how much money Microsoft made by selling perpetual licenses that turned out to be a lie, add interest, add a 50% penalty, and require Microsoft to pay all of that into a trust to be collected by any customers harmed.

The point would not be so much to help the customers but to cause the actual cost to Microsoft to be sufficiently high as to disincentivize corrupt behavior.