If I want to give something to a mate for free and do this through the post, then the delivery company is making money off the fact that I am doing so. But this

If I want to give something to a mate for free and do this through the post, then the delivery company is making money off the fact that I am doing so. But this does not mean that the transaction between me and my mate is commercial, even though a commercial entity is making money off the delivery.