The NBA circuit reference one isn't totally accurate. If you've "done the NBA circuit" you'll notice that tickets vary wildly according to the demand of each city.
The average ticket price of a Knicks game at MSG or a Lakers game at Staples for instance, is substantially higher than that of a Wizards, Pelicans or Hawks game. $30USD can get you floor seats on Stubhub for most of those teams, whereas the same amount won't get you in the door at the bigger, more established franchises like the Bulls, Knicks and Lakers, where demand is consistent regardless of on court performance.
Is there an issue with this same logic applying to the NBL? You wouldn't expect tickets to a 36ers or Crocs game to be equal to that of a Wildcats game because similar demand doesn't exist.