From the official website...
There was no warning that the spaces were running out! And it wasn't stated what was the maximum allowable participants either! Although, yes, I should have signed up earlier when I've decided to take part, rather than wait for the closing date, 20th April.
Since I have already booked my accommodation and post race plans. But I was being cautious - in case of injury, lack of fitness etc. Didn't want to waste a A$240 entry fee!
I've sent an e-mail of appeal and also rung them up. Was told that I'm number 5 in the waiting list, so keeping my fingers crossed very tightly!