[TeMPOraL]

Sort of. For Reddit, economies of scale applied at the platform level. Sure, individual subreddits had to moderate submissions and comments on their own, however they didn't have to secure servers and networks against attack, manage user credentials, defend against DDoS attacks, etc. Even with spam / abusive content, the more egregious forms would be filtered out centrally, which is more automation subreddit operators had to neither manage nor pay for.