Why don't the Tab's?
More than 1 exchange is sorely needed.
Tabcorp et al are just not in the right mindset to exploit such an opportunity. But don't get me started.
However there is a very obvious solution.
None of us could possibly want that insane wallet set up that Betfair inflicts upon us, so having all the computers in the Antipodes is fine.
BETDAQ could get a licence in Norfolk Island virtually immediately.
And it could use a service company on the island to handle the local issues. Essentially client deposits/withdrawals, legislation nightmares and timezone afflictions. It makes far more sense to enter results in civilised hours here, rather than disrupt someone's Circadian rhythms in Ireland, Gibraltar, Malta, Belarus whatever.
The costs should be the same as doing it over there.
Mike King essentially did that and more with Austote before Mark Read pulled his trademark sabotage stunt. So I'm sure his arm could be twisted.