Tom, Dick and Harry now each owe Joe some so-called loonies, because they "issued" them to him. Which is to say, he has a bunch of IOUs, or as some call them, tokens, called loonies, a bunch of different loonies in that each of those loonie-IOUs is from a particular "issuer" of loonie-IOUs.
Now Joe, as far as we know so far, is not yet an "issuer" of so called "loonies" himself yet.
So, thinking about inviting Vlad to the group's next get-together and knowing that Vlad likes to use so called IXC, Joe tells his account to trust Vlad for some number of IXC then sets up buy offers pairing Vlad-IXC against Tom-loonies, Dick-loonies and Harry-loonies, since those are what he currently has on hand.
Along comes Vlad. He is going to go to lunch with those guys at their local watering-hole. He has heard the story so he knows those guys use so-called loonies, and he also knows that Joe trusts Tom's loonies and also Dick's loonies and also Harry's loonies.
Vlad decides he might as well introduce those guys to IXCoin.
So Vlad, knowing that Joe is a "hub" for loonies in that crowd, finds out Joe's account and tells his to trust it for "loonies".
Heh heh see what he did there? He made Joe, too, into an "issuer" of loonies!
Now that he trusts Joe-loonies, he can set up trade offers involving Joe-loonies.
Hopefully since Joe is a hub for all those other issuers of loonies he can get away with only having to set up one trust-line for loonies, trusting Joe for them; Joe can be his gateway in and out of loonieville hopefully so that he does not need to separately trust each and every one of all those other guys who issue "loonies". Afterall he knows Joe trusts them, so he can let Joe field all the loonies business for him.
So they all go to lunch. This time it turns out to be Tom's turn to cover the bill.
So everyone else needs to send Tom some kind of IOU that he'll accept.
Joe, of course, can send back to Tom Tom's own loonies, if he has enough to cover his share of today's bill.
Tom decides to trust Dick and Harry for "loonies", just like Joe did last time. They are thus able to issue loonies to him.
Ah but Vlad, Vlad. This is when he makes his IXC pitch...
...
"Sorry but I am not really into the idea of issuing loonies," he says, "so how about either you trust me for IXC, or maybe Joe will trust me for IXC and I'll trade him some IXC IOUs for some loonies IOUs he issues himself?
I should point out though Joe that it can be a very useful practice to use a second account when you issue things, so you can issue them to yourself.
If you create a second account, and have that new account trust your current account for loonies, you will then be able to have that new account make buy and sell offers, offering to sell Dick-loonies for Joe-loonies and to sell Harry-loonies for Joe-loonies. Heck, set up an offer to sell Tom-loonies for Joe-loonies too while you're at it.
Now if you actually issue yourself - your new account - some Joe-loonies, you will have a Joe-loonies balance so that you can offer to buy Tom-loonies, Dick-loonies and Harry-loonies using Joe-loonies.
Presto, you are now a conversion hub!
Anyone whose client supports "pathfinding" conversion between IOUs (or maybe they call them currencies, or tokens, whatever) should hopefully be able to ask to convert any of those kinds of loonies into any other of those kinds of loonies and the "pathfinder" will find the cheapest path to go from one to the other.
Unfortunately some clients might only do pathfinding through things that have "reasonable" volume and spread, but oh well what can I say, some clients are broken compared to the original vision of how this stuff was meant to work.
Now if Joe will set up an offer to buy IXC for Joe-loonies, any time any of you guys wants me to send you any of your various types of loonies I should be able to tell my client I want to send one of your various kinds of loonies and a path should be found whereby my IXC goes through however many people in-between as it takes to end up with the loonies you trust getting to you. That is how it is supposed to work, anyway.
If these puny little phone-apps can't handle that, then at least hopefully I can sell Joe enough IXC to have him send Tom my share of the bill in some flavour of loonies that he trusts?
Oh and by the way, Tom, if I can convince Joe to sell me some Joe-loonies for my Vlad-IXC, I'll be able to buy Vlad-IXC using Joe-loonies in the future so if anyone sends you any Vlad-IXC you can sell them to me for Joe-loonies, so I suggest you set up to trust Joe-loonies even though today he had enough other kinds of loonies to pay his share of the bill thus you didn't have to set up to trust his own-issued loonies..."
...
Complicated? Nahhh...
-MarkM-
Complicated? Nah, just next level Sophisticated financial instruments that can spread like wildfire if ease of use is
there. Someone with enough coins/tokens can literally function like a bank. And no need to move go NY.