The problem here is not only sharing games but cracking them too. That is the main problem actually. I’ll quote myself just to clarify it.
Crackers are disappearing because the job got too hard and they don’t have any incentive to do it. Add money to the equation, make them earn a little for it, and then both gamers and crackers will benefit from it.
What makes you think that? If the cracker doesn’t get paid, he won’t crack the game. Actually, the crackers himself might be the seller.