I signed up for a year contact with 2degrees and got prime video free, I got an email about how to set it up. I didn't set it up immediately and got a reminder email a couple of weeks later. So far, so good :)
In the reminder email the "Get Prime Video" link at the bottom of the doesn't work - it goes to the 2degrees website but that says "page not found". This is the link
https://secure.2degreesbroadband.co.nz/otl/login/
I went back to the original email and the link is a bit different (I changed the number below)
https://secure.2degreesbroadband.co.nz/otl/login/11aa11aa-1a1a-1a1a-1a1a
I think reminder email needs to be tweaked a bit so it works.