Consider: your playable digs up a dozen treasure chests, and sells them in his store. One of the non-playables buys like half of them. Later, your playable falls in love with that customer, and wants to marry them. And when they do, you'll find half a dozen treasure chests in their inventory, which you can sell AGAIN...
Do *I* care? Yes, I do. Because I think that's fraud!
Do *you* care? I have no idea.