> here in NZ...all major ISPs have completely ditched their fair usage policies.

I'm quite fond of NZ and I've heard good things about the quality of your telecoms regulation, but ....

     We manage traffic which may influence your broadband performance. This means we might have to pause, restrict, end or slow the performance of your service if it’s necessary for us to protect our networks or manage traffic over our networks. See clause 6.6 of our General Terms for more details.

and

     You need to use our services fairly – we’ve set out our rules on this at clause 2.6 of our General Terms.

and

     Fair use by you: You must use our services fairly. This means you agree to use them in a way that’s not overly excessive or unreasonable. This policy is based on how most people use the service and helps us make sure everyone using it gets to enjoy it. If we, acting reasonably and in good faith, believe your use is excessive and unreasonable, we might need to restrict the service or stop providing it to you. 

All from Spark NZ's conditions[1][2] for their "unlimited data" fibre product[3].

[1]https://www.spark.co.nz/help/other/terms/personal-terms/esse... [2]https://www.spark.co.nz/help/other/terms/personal-terms/gene... [3]https://www.spark.co.nz/online/broadband/buy-plan?category=f...