To get the code, download the Nike iOS app [Direct Link], make a purchase worth $100 or more, and then pay with Apple Pay. The promo code for $20 will then be delivered to you within two weeks of your original purchase date, and must be redeemed within Nike by November 20, 2018.
Apple is encouraging students to gear up at a few other Apple Pay-compatible stores and apps, including Staples, Office Depot, JanSport, Walgreens, Jet, and J. Crew.
It's been a few weeks since the last Apple Pay promo, which offered summertime savings in a range of apps like Fandango, Groupon, Houzz, and Seamless. Previous promotions have also seen Apple team up with StubHub, Adidas, Postmates, Instacart, and many more.