The website said
When you buy 200 blue crowns using our online shop or promotional code, you get "premium" status and an important advantage: sleep readiness, which allows you to plan tasks following a sleep cycle.
I got the premium style portrait border, the 200Crowns and a new date display over the task bar, but not the sleep readiness. People in chat said to contact support.
Realm: Wojtek
Character name: Iberis
Account is through steam.