I have absolutely no idea what the hell you're talking about, but it sounds great.
PLEX prices seem a little high in Dodoxie, though. I paid barely 400 million for my last one a couple of months ago.
Go to the official forums to see a stickied post about this - CCP encourages it. It sounds like you play so I don't know what part is confusing to you but you can do a 14 day trial, or you can get an invite for a 21 day trial. The 21 day is a "Buddy Invite" and the person inviting you gets a reward for that - basically one month free play time - if you sign up for a paid subscription.
A paid subscriber (there is a requirement that you be one for a certain amount of time, but I'm not sure of the exact amount of time) gets 10 buddy invites every month that they can dole out. So, CCP has that sticky thread where people can post Buddy Invite offers (that look like LittleFingerBaelish's post) and potential offerees can ask questions about them. Everything else is OT and will be deleted.
Some people playing the game will start second, third, or more accounts in order to have an alt or alts. Since characters train skills simply by queing them, but those skills train in real time, and since you can only have one character training skills at a time, setting up another account is more efficient. But it costs money to play. Unless you get free time from a Buddy Invite.
So, you can set up multiple accounts, give away Buddy Invites, get the free time and you're good to go, so to speak. The game time can be collected in a form (Plex) that can be sold in-game.
But, now this has become rather competitive, apparently, since a lot of people are doing it. So, in order to get the new person to use your Buddy Invite you offer to pay them, in game currency, the price of the Plex. How does this benefit you? If you can make, in-game, the cash to pay the new person then you are essentially turning that in-game cash into game time.
What I'm missing is, the purpose of jumping through all these hoops instead of just taking your in-game cash and buying Plex on the Market. I guess the answer is in LittleFingerBaelish's post - you don't pay the full price of the Plex to the new person, you pay a % of it. If you pay 90% and all 10 of your invitees sign up, you wind up with a full month of play time. Since some don't wind up signing up I guess it's best to pay 80% and hope for half of them to sign up.
I think I have that all correct, I'm sure someone will correct me if I'm wrong.