by thedacker
"If you hire a tradesman, you are required to activate the card at least once".I'm sorry, but when I read this rule, I see it as most definitely implied that the activation it speaks of must be immediate upon hiring a tradesman. I'd say if the rules allowed you to activate it later, it would definitely clarify that. And the rule for some sort of penalty--that which you seek and can not fine--would also be there.
I think you should accept that even though the line isn't written absolutely perfect, it's good enough to determine the rule based on other factors, i.e. no existing rules of a penalty for not later activating the card and why it would be mentioned with (even in the same sentence) the rules for hiring the tradesman.