Craigslist is a user-monitored site where all transactions are directly between buyers and sellers, with employees not involved unless problems are reported. It has been successful due to its large community of users from diverse backgrounds who post, shop, give advice and make friends. While generating enough revenue for its small staff, Craigslist's founders aim to keep it focused on online communities rather than advertising. However, some users have faced scams, and the terms of use make clear Craigslist is not responsible for content but will help authorities with illegal cases.