jurgen dobo : Mnet

P2P file sharing, and services like Napster, and 
subsequently Bittorent which spun out of Mnet.

Mnet itself was a peer to peer file sharing service that 
employed a digital currency called Mojo, which in a fully distributed network provided an incentive 
against attacks, one of the first "smart contracts."

https://en.m.wikipedia.org/wiki/Mnet_(peer-to-peer_network)