If i'd make a guess, i think they will be rewarding more clintz for the DT in that particular hour .-.
@Battery: I meant the little billboard thingy on the front page. Below 'Earn free credits' billboard. In the same column as 'available on the app store and Google play', big "Urban Rivals" title and the box with player stats, wealth and play button.
My guess: Clintz awarded for matches are increased for that hour?
Something like that?