You nailed it! Telstra has a coverage, competition does not! That's why Telstra can and will charge more. Why? Because Telstra also invests more!!!
DISCLAIMER: I do not work for Telstra or any other ISP. I never did. I have wealth of practical knowledge in Computer Security and Forensic Computing. I have been in the field since 1985.
Likes (formerly Kudos) and solutions are appreciated!!!
The comments expressed by me reflect my user experience and personal opinion.