"How else do you grow your audience?"
What audience would you consider best to target for growth? Would you agree Australian NBA fans? They already have an interest in basketball. Not sure how many can really be swayed to follow NBL from these games, but NBLxNBA is also on NBA League Pass.
From my own friends that follow NBA but not NBL, they have seen a few of these games, and at the least, it helps them learn about specific NBL players. A lot of Australian NBA fans had some past interest in NBL, but are not up to date so they don't know many NBL players playing today. Getting those names out there in the consciousness of these basketball fans is a start.