https://www.polygon.com/2018/7/3/17531760/splatoon-2-bundle-nintendo-switch-online

To commemorate the first anniversary of Splatoon 2, Nintendo is releasing a specially colored Nintendo Switch and Splatoon 2 bundle, which includes a ticket for a three month Nintendo Switch Online personal plan.

Nintendo Switch Online rolls out this September and will be the first premium Nintendo online service. Games like Splatoon 2 that rely heavily on online multiplayer will be heavily affected, since players will now need an Nintendo Switch Online subscription in order to participate in online multiplayer. Previously, online multiplayer was offered for free.