So this technically isn’t food related, but you CAN buy food with it! Marlboro is offering a free $10 amazon gift card (code sent via email) to anyone with an account on their site. No purchase necessary, you just have to verify your age.
They do a lot of free giveaways that are volume-limited with no restrictions, so not a bad idea to keep an eye on them. This one was just too good and easy to not share.