Essentially Telstra (the biggest ISP in Australia) charges a fortune for transit. Cloudflare provide some detail about the relatively high cost here: <a href="https:&#x2F;&#x2F;blog.cloudflare.com&#x2F;the-relative-cost-of-bandwidth-around-the-world&#x2F;" rel="nofollow">https:&#x2F;&#x2F;blog.cloudflare.com&#x2F;the-relative-cost-of-bandwidth-a...</a>