From the SCO FAQ on Linux licensing:
If I am running SCO Linux or Caldera OpenLinux do I need to obtain a SCO IP License for Linux? - Yes.
This means that SCO itself sold products that are illegal (by their own definition). But SCO certainly sold these products to customers who in good faith purchased them from SCO believing the business was legitimate. Does this now mean these customers can sue SCO for fraud?
In any case, this should be a goldmine for any consumer protection advocate — a company that sells a product and then later comes along and tries to charge people again for the same service they already purchased.
Absurd. Completely absurd.