If I tell them I'm asian when booking, show up and I'm actually Aussie would they say that I can't see them and cancel the booking? WL will then miss out on garanteed $$$ and there might not be a walk in during the cancelled booking time slot.

It could be a funny case of role reversal. How many times have punters been lured by fake pics and descriptions and still go ahead because they are horny and no other girl is available or don't have time to go elsewhere. Same difference!