It seems like this would/should be covered under Australia's unfair contracts law, which requires the term to have a legitimate interest as well as being transp

It seems like this would/should be covered under Australia's unfair contracts law, which requires the term to have a legitimate interest as well as being transparent (which I dont think would be met if they are charging 50% of the remainder, when they would have been happy for you to get a monthly subscription and cancel after a month, only having spent a fifth of what they would charge for termination)