By that definition, almost every user on every social media platform would be an "employee". What reddit mods are doing is really not that different from creat

By that definition, almost every user on every social media platform would be an "employee". What reddit mods are doing is really not that different from creating a facebook group to organise a party with your friend or a twitter page to share curated content that you love. Mods don't work for reddit, they work for their community/subreddit. Creating a group on a social media platform doesn't make you an employee that can be fired. It makes you a power user that can get banned if you mess with other users/communities or with the platform too much.