One month freebie trial / free subs with qualifying purchase - JB HiFi streaming music
You can trial it for a month as a freebie with your mobile number and email. Doesnt look like its capped for the trial and you dont need to provide payment details.
They're also running a promo 'Free Subscription' with qualifying purchases in JB stores although I cant find anything showing whats qualifying. Ask instore. The free subs would begin following the 1 month free trial.
Worth a suck it and see - at least you get one month free of charge.