What is Duelist Premium ?

while browsing around on the official site i found the rumored faq again were it is explained .Those who are interested can read it here

http://www.yugioh-online.net/v3/pages/faq/index

What is “Duelist Premium”?

Extra service for the customer who has increased a BOOSTERPASS Point.
You will be able to use below service during a certain period:(*1)

1) You can Duel against the All NPC characters. (*2)
2) You can join the official events.
3) You can create “User Events”.
4) You can create a Team.

*1) There is a possibility that the service will be changed without notice.
*2) Depends on the status of the game, some of the NPCs will not be able to Duel.