Just got an email from Coco Cubano with a $5 voucher "just because", with a recommendation to try their Aussie Day Burger - I was surprised to find that it's no minimum spend. I'm guessing it's an Australian Day promotion so hopefully not targeted. I created my Coco account ages ago for the free coffee on signup, I'm not sure if they'll send out a voucher for new accounts, but it might be worth a try!
$5 is enough to get a free coffee or a reasonable amount off of some food.
Menu: https://www.cococubano.com/menu
Locations: https://www.cococubano.com/locations
Enjoy!
Not in VIC!