Why is it more expensive to buy multiple license at once?

Hey, The price now for the launch month is 9.99 per device. Prices will be different after it with bundle discounts (but still more than 9.99 per device) I rounded up by 2 cents for the 2 devices and 3 cents for 3 devices to make the number nicer to read Users can always buy 2 keys for 1 device separately and receive a 2-cent discount if they like to, I don't limit that option