It was the brainchild of some Port Adelaide CC members. It died out (we killed it off) because it was no longer 'obscure' - the riders were looking forward to it! Luckily, half a generation has passed, so maybe next year... (never say never).
Other uniquely Australian things are handicap racing. The Deceuninck-Quick-Step team attended PACC's Roller Frenzy on the Friday night of the tour, the whole concept or both riders having a theoretically even chance to win each race blew their minds.