The internet is a copy machine.
The digital economy is thus run on a river of copies. Unlike the mass-produced reproductions of the machine age, these copies are not just cheap, they are free.
Our digital communication network has been engineered so that copies flow with as little friction as possible. Indeed, copies flow so freely we could think of the internet as a super-distribution system, where once a copy is introduced it will continue to flow through the network forever, much like electricity in a superconductive wire.
We see evidence of this in real life.
Once anything that can be copied is brought into contact with internet, it will be copied, and those copies never leave.
When copies are super abundant, they become worthless.
When copies are super abundant, stuff which can't be copied becomes scarce and valuable.
When copies are free, you need to sell things which can not be copied.
Well, what can't be copied?
Here is the answer: "intangibles" or "regenaratives".