There is very little interstate travel for the 10 or so Victorian AFL, and similar NSW NRL clubs. Some AFL clubs like Collingwood only leave Victoria 2-3 times per season.
So maybe it's just a greater novelty for all those VIC AFL fans to head to Adelaide for their big 'Gather Round'. Same all the NSW league nuts that visit Suncorp for the big NRL 'Magic Round' meetup.
Compare that to the ALM die hard fans who already do a lot of interstate/NZ travel if they want to watch their team at every away game.
So maybe it's just a greater novelty for all those VIC AFL fans to head to Adelaide for their big 'Gather Round'. Same all the NSW league nuts that visit Suncorp for the big NRL 'Magic Round' meetup.
Compare that to the ALM die hard fans who already do a lot of interstate/NZ travel if they want to watch their team at every away game.