Premium

Premium gives extra items and conveniences. A premium player has the same rates as everyone: experience, mastery, item drops and mining do not change.

How to buy it

The "Premium" window: the premium state, the 7 and 30 day options, the "Buy" buttons

The "PREMIUM" button is on the bottom bar, right of SHOP. It opens the "Premium" window:

at the top — whether premium is on now;
the options: 7 days — 1200 shop points, 30 days — 2400 shop points, each with a "Buy" button;
if you already have premium, a purchase extends it from the end of the current one.

It is paid with shop points.

What premium gives

A premium item at login. When you log in, the "Choose a Premium item" window opens: pick one of the items offered. Premium items work only while premium lasts.
The cloud inventory — 100 cells at once, 400 more open once per account.
The "PREMIUM" label above your character's head.

The details, with the item windows, are in the "Premium" topic of the "About the server" section on the forum.