Premium Account

What it costs

Premium is bought with premium points in the shop:

30 days - 30 points
90 days - 80 points
365 days - 280 points

Days stack, so buying again while you are still premium extends what you have instead of replacing it.

What it gives

The clearest difference is outfits. The newer outfits and their addons are premium only - a free account can earn the storage for them, but the outfit will not be worn until the account is premium.

Checking it

Your account page shows the days you have left. It is a property of the account, not of a single character, so every character you own is premium at the same time.