I live in Oz and am a frequent LOS visiter 4/5 times per year. I just did a tourist eVisa cos of fear of IO discretion making up their own rules re multiple VE's and demanding eVisa etc re " come too many times" accusations. During 2024 I did 2 tourist visa's first 6 months and 2 VE's second 6 months for a total of <180 days and intend to do same in 2025 and beyond - subject to IO discretion (Non O, DTV, etc not for me).
MFA Deputy Director has clearly stated they are unlimited but subject to IO discretion
Not according to directives via IO discretion