Everything at UC is paid exclusively using your RULE-card. It's a digital currency existing for over 20 years now. If you are new the concept, check our description on the Features-Page:
In the past you could either pre-charge your RULE-Card when buying your ticket, or charge it using cash on-location.
From this year on your RULE-Card (both existing ones from previous years as well as newly issues ones) will be linked to your SceneCity/Underground Conference account. You will be able to check your balance and list your transactions.
And most importantly you will also be able to top up your RULE-Card via online payment before and during the party.