[avaer]

The value of the trickle of gasoline to get me to my kitchen is less than zero. To use it I would have to waste considerable money architecting a way to get my car indoors.

The value of AWS is greater than zero because spending my day monitoring my server would be exponentially more costly than paying Amazon to do it at scale.

And Ether is worth less than zero (as a computation engine) because I could develop and run the computation in less time by opening vim, even if the Ether was free.