Can someone simplified this for me?

[Robobandit]

Unless you intend to be playing 3 characters at exactly the same time, this does not apply to you.

If you're sharing a square enix account with multiple people in your household, each of you will need a copy of FF XIV/registration code if you want to be logged in at the same time.

If you're the only person playing on your square enix account, then you only need 1 copy of FF XIV + registration code, which you already have having played 1.0.

How many characters you can create depends on your subscription level.

[MiNuN]

Unless you intend to be playing 3 characters at exactly the same time, this does not apply to you.

If you're sharing a square enix account with multiple people in your household, each of you will need a copy of FF XIV/registration code if you want to be logged in at the same time.

If you're the only person playing on your square enix account, then you only need 1 copy of FF XIV + registration code, which you already have having played 1.0.

How many characters you can create depends on your subscription level.

Do you know how much a registration code cost?

[Vilhem]

Do you know how much a registration code cost?

The price of a game, Standard or CE lol. Maybe when the service website opens on launch, they'll sell just the codes for a smaller fee.