HN goes a step further. It has a function that allows moderators to kill or boost a post by subtracting or adding a large amount to the post's score. HN is primarily a place for Y Combinator to hype their latest venture, and a "safe" place for other startups and tech companies.
The team I work with it took nearly 3 months to get basic questions answered correctly when it came to a sales contract. They never gave our Sec team acceptable answers around privacy and security.
Reddit is free to play for marketing firms. Perhaps they could add extra statistics, analytics, promotions for these commercial users.