Free Amazon Prime 6 Month Membership for 18-24 Year Olds – Grubhub is offering a free 6-month Prime membership to 18-24 year olds. No student verification required, but the offer is only available to new members. Free Splat Pride Stickers – Complete the form to get free Splat pride stickers. Free Dig In! Poster Set – Click Add to Cart and check out to receive a free set