We have to remember that when we consider investment in various macro business needs we see that acquiring customers and stimulating sales is key to generating service and products, someone wants. In a Network the problem is different there is a two sided market working together to explore the network effect.
These two entities can easily be codified. When we give the citizen, consumer, courtier a handheld and every merchant or establishment a device.
The simplest hand held thing is a key, fob, card, watch, bad, phone, ear piece. Followed by, or originated by, the presentment of the person seeking to participate as a buyer, seller, communicator, listener, teacher or any combination thereof to the second party.