So right before MakerWorld was down 2 days ago, I noticed that other peoples models started to show up in my transaction history. I’m pretty sure other peoples redemption history was being published as well. I just checked my giftcards and they had all been drained. I have opened a ticket with the support but they responded that they are not working on weekends and would check in on it next week. But to everyone else with unspent gift cards in their redemption history, double check them all.
Just open the store, add an item to the shopping cart, hit check out. Under your added item there will be a box that states “Discount code or gift card”, type in your gift card and check apply. Do not need to actually check out and spend it, but you will either get a discount added to the order “Gift card •••• XXXX(Last 4 characters of the giftcard) − €40.00”