A logical strategy is for Tesla to treat regional networks like NRMA as pathfinders to gauge demand.
Watch for whichever of their sites are overwhelmed, and then overbuild a Supercharger in its general area. Mittagong for example. NRMA's is a single point of failure (and it's currently offline due to vandalism). If Tesla overbuilt, perhaps at the Sutton Forest (Sally's Corner) service centre, or the Pheasants Nest service centre (I really love the one-lane underpass between the twin servos there!), then Tesla drivers would have an option that everyone else won't, and can take road trips with less anxiety. If you don't mind long detours into towns, you could still use the freebie if you want. A Supercharger is better sited on the highway, but the freebie should be in town, where local goodwill pays for a charger to encourage us off the highway and hopefully open our wallets in town.