It used to be for select Nintendo titles like Spaltoon. Now you have to pay for the service, which includes: online multiplayer, Nintendo classic games library, and cloud saving. NSO is currently $19.99 for a year, $7.99 for 3 months, and $3.99 for 1 month. You can also get the membership plus expansion pack for $49.99 a year. This allows you to play N64 titles.