Commerce includes many unspoken agreements. Order a meal at a restaurant and expect to pay list prices +taxes etc, you don’t expect to be charged for using th

Commerce includes many unspoken agreements. Order a meal at a restaurant and expect to pay list prices +taxes etc, you don’t expect to be charged for using the salt on the table, or the price of a doggy bag etc. Airlines don’t charge people to go to the bathroom, though they may reserve better bathrooms for first class etc. Companies breaking with these trends face a backlash assuming a competitive marketplace.