On eBay, I'm a peer, your a peer, we're a peer, they're a peer. Everyone who can buy or sell on the site is a peer. Uber/Lyft. Super-peers are the drivers; they drive peers. Airbnb. BoatSetter. A bunch of others.
Welcome to The Sharing Economy. We're all offerers of talent or stuff or money. Or just insight (hi, Shmoop). If you haven't read the tale of Stone Stoup, well, you should. That's what the modern era is all about. Give everyone something to lose, and peace will break out all over the world.
