If you regularly fly out of YBAF, your landings will easily exceed the $500 Airservices threshold.
One of the excessive charges at YBAF this year is the increase of bitumen tie-down charges by 11.7%, while the grass tie-downs just increased by the standard CPI 1.7%.
AAC has been doing this for two years now. This year it was 10% + CPI for bitumen tie-downs; Last year, it was 5% + CPI. Previously all tie-downs just increased by CPI regardless of where they were located.