I've just renewed my Nintendo Switch Online family subscription and have a few slots available. The subscription is valid until 27th April 2022 so there's the most part of one year left.
Nintendo Switch Online lets you play online games (of course!) on your Nintendo Switch (games like Splatoon, Mario Kart, Animal Crossing, etc). Your saved game are also backed up in the cloud. And it also gives access to a great collection of NES and Super NES games.
If you'd like a slot, please let me know in a comment or in a private message. Happy to add you in my family account for £4.