Well, JDC events are usually in weekends. So were most of the jj2wc matches. JDC + JJ2WC = "OMG POSTPONE EVENT BECAUSE I HAVE TO PLAY JJ2WC UNFAIR HQDFKHSQFKSFCSVKHC"

If that sounds harsh, have a look at the reactions of people who miss big or spontaneous events next season. They tend to get really nervous and annoying.