How to Set Up a Nintendo Switch Online Family Membership - Nintendo Switch Wiki Guide - IGN
Nintendo Switch Online Membership Pricing And More Details Revealed - GameSpot
Nintendo Switch Online Review | PCMag
Switch Online sees 36 million paid users | GoNintendo
Nintendo Switch will have a paid online service starting this fall - Polygon
Nintendo Switch Online - Nintendo - Official Site
What's Included with a Nintendo Switch Online Subscription?
Nintendo Switch Online - Nintendo - Official Site
You need a paid membership to Nintendo Switch Online to play course world in Super Mario Maker 2. Pretty sure you could access course world at no extra cost in the original