I can't post this deal as HelloFresh is a banned website for deals as they have apparently spammed Ozbargain, so I thought I'd put it here in case it is of interest to anyone. I came across a code Enjoy50off which gives you 50% off all orders until 18 January. Is supposed to apply to all boxes ordered, but not the "one-off delivery trial boxes". Need to cancel after your first order if you don't want to continue receiving them.
It isn't cheap, but with 50% off it may be worthwhile? Better than the standard $20 or so off an order.
I'd steer clear of these HelloFresh clowns:
https://www.ozbargain.com.au/node/163605
After seeing an 'Aussie Farmers Direct' deal on here recently though I ordered a box from them, and it arrived on Monday, as scheduled. Attentive/polite delivery guy, well packaged stuff, the food is great; I can highly recommend Aussie Farmers Direct.