Answer: If something someone else has created is useful to you, it has value, and you should assume the creator wants compensation for this work
Explanation: This "no free lunch" rule implies that every thing or service is created by someone and as such is the property of someone, unless otherwise stated. This again means that if something is someone's property then compensation should be made for something useful that we have received from that creator, at least he expects it, as we do to make something and in return receive satisfaction in the form of compensation.