Reddit is free to use, and subreddit moderators are largely free to set their own rules for their little club, and can spend as much or as little time as they l

Reddit is free to use, and subreddit moderators are largely free to set their own rules for their little club, and can spend as much or as little time as they like enforcing them. No-one is exploiting 'free labour' here - the service Reddit offers is essentially a bulletin board hosting service, and they offer it free of charge (although yes, they do monetise it in other ways). Festivals (at least in my country) used to offer tickets in exchange for work, so again, I wouldn't really call it 'free' work. If you don't want to work for your ticket, you can buy it with money. Not sure that's a great proposition though, because a camping ticket to Download (a popular rock festival in the UK) costs about the same as 40 hours' work at the minimum wage for an 18-20 year old.