https://www.polygon.com/2018/9/14/17861300/fortnite-nintendo-switch-online

Nintendo will launch its for-pay online service for the Nintendo Switch next week, but fans of Fortnite don’t need to worry about another bill; the popular online battle royale game will not require a subscription to the new service.

“Beginning September 18, 2018, a Nintendo Switch Online membership is required to participate in co-op and competitive online features for many first- and third-party Nintendo Switch games, including Splatoon 2, Mario Kart 8 Deluxe, ARMS, and Super Smash Bros. Ultimate,” Nintendo states on its official FAQ. But it makes a special note about Fortnite.