Marketplace
FREEBIGMAC
Friend shared this if you're an existing user and can't get new user discounts. You can add a free Big Mac to any order, as many orders as you like, using FREEBIGMAC code.
Add $25 of food, add a Big Mac (just the burger) enter the code and it deducts it.
Also valid with Menulog (Select restaurants)
just fyi Big Mac is automatically free with 25$ purchase from UberEats. + Shopback 3$ bonus + Shopback 5% Cashback + 'MACCASMAC' code for free delivery
edit - automatically free but you still have to add it, checked and ordered as of last night.