The document discusses different types of Reddit ads including untargeted site-wide ads starting at $20 per day and targeted subreddit specific ads starting at $30 per day. It provides tips for choosing relevant subreddits, following subreddit rules, and reviewing other ads. The document also discusses how Reddit was added to Ad Blocker Plus' whitelist in 2013 and how paid traffic compares to natural traffic. Finally, it covers StumbleUpon ads pricing starting at $.05, using auto and manual category selection, and how paid StumbleUpon ads can help drive natural success.