Board Thread:Game Discussion/@comment-56.0.84.26-20160510024827

Does anyone know how this offer works? I found this offer under store free gold. Do I have to pay $20 for gift card and just the get the 120 gold or buy the gift card and still have $20 to spend at subway plus get the gold? I don't want to buy it and use it just for the gold because for $20 you can get 183 gold, which is cheaper. 