Make up your mind. First you say all the "no-noobs" don't play, then you name a few people and say all the other good players do play. Which will it be? I think i remember one or two CC members dropping by in events, just not very often.

People can compete in JDC whenever a season is going on, regardless of their skill, clans or favourite ice cream flavours. (unless you'd get caught cheating, but that's not too hard to figure out ;-P) It's just as simple as that.