It's common with cloud services to offer a limited free tier to get people interested, and it is the least Nintendo should offer since they don't allow save backups. Start with a free cloud save feature open to everyone but limited to 1GB or even less. Need more? Pay up for an online account. Afterwards when your subscription expires, and your total saves are above the limit, you select which cloud saves you would like to keep.
The mobile app should also have option to make groups and send text chats. That would make it much easier to organise matches.
Easy as that
Last edited by TomaTito - on 20 September 2018