> Is that an efficient use of their time in terms of creating value for each other? Yes. Value is largely subjective. This underpins supply and demand. Things

> Is that an efficient use of their time in terms of creating value for each other? Yes. Value is largely subjective. This underpins supply and demand. Things that are in demand are valuable to us, and what's in demand is often subjective. So although you or someone else may not value things like Snapchat or Facebook, society in the aggregate does. Much in the same way that gold, bitcoin, or a rare painting is "valuable". It's valuable because someone is willing to pay for it.