The following is just my opinion and my goal is not to insult or promote the server, persons or bussines I will mention.
So you are basicly saying THEY CAN'T make your account having +6 characters per server?
I have seen MMOs that allows the accounts to have over 10 characters per account in each one of their servers (Elsword, Fallen Earth, Star Wars The Old Republic, etc), they obviously can do it, why not then?
To be honest I gave this opinion because I even think that Ignis is going to have more power / potential than the original Fiesta, why? Because the Ignis developers (as I see) are striving more than Original Fiesta ones. We can see the difference of the potential since Outspark becomes part of Gamigo, Outspark strived a lot and as I remember they are who created the trickster (correct me if wrong), now they have tried creating a new class (Crusader, copy of all of the past classes, accordingly my opinion because of the weakness) to try pulling few players, as all that failed they are trying to make "big major updates" which all of them are what normally a Private Server would do, just Ctrl+C -> Ctrl+V, now see what Ignis have made, do you see what I want to show you?
As I said just my opinion.