Most of the pins are only giving me 20/30/50MB, and Dunedin isn't exactly covered in pins compared to some cities.
That being said, I was in Christchurch and remembered to check the app in a few malls I was in - so managed to get a few extra MB (best was 300MB). Only have 1.5GB so far though.
Still finding the app is so slow ... on an LG G6