Re: I buy those old-fangled CD things.
"our unit has an NBN connection:"
Read your Acceptable Use Policy and try to tell me that it's unlimed. The definitions are all so broad, even THEY don't know what's unacceptable.
It's been said you'll never get a straight answer out of them - and for the vast majority, I'll believe it.
I had been pushing my uploads at about 80% capacity consistently for a couple of months before Optus threatened me with disconnection unless I "stopped". So I emailed and asked what *is* acceptable.
It took a bunch of emails back and forth before they gave me a hard number that wasn't "less than what you're using now". And I'm guessing that number will be different for everyone.
Face it. You DO have a limit, it's entirely undocumented, and it's different that anyone else. Good luck in finding out what it is. This is what domestic internet is all about.