This is sad, because clearly there were players who wanted to race. 
It should have been clearly mentioned in what server each race is supposted to be and hosted by whom. Then...this is not only to admins but also racers...if you promise something (list yourself into some event) you should be able to fullfill that promise. I understand that sometimes unexpected things turn up, but then you should inform that as soon as possible - so if a race is postponed admins should report it here. In team races if a racer doesn't show up it can be really bad as the team could be undermanned.
It should have been clearly mentioned in what server each race is supposted to be and hosted by whom. Then...this is not only to admins but also racers...if you promise something (list yourself into some event) you should be able to fullfill that promise. I understand that sometimes unexpected things turn up, but then you should inform that as soon as possible - so if a race is postponed admins should report it here. In team races if a racer doesn't show up it can be really bad as the team could be undermanned.