We didn't file a counterclaim. Because my lawyer said it wasn't necessary. Because even if we won the counterclaim, we would have earned very little money.

Since the other side may be doing this commercially, they may be thinking in terms of mass production. In other words, they file lawsuits and earn as much as they can. If they can't win, they keep filing lawsuits against others. They don't bother.

They might not be making it a matter of pride; they might just be thinking about making money.