It was tough to be a Redditor in 2015. For every small, vibrant subreddit devoted to a hobby or earnest advice, there was a cesspool of misogyny or a community devoted to snuff films. But CEO Steve Huffman has been working to make the site less scary, and advertising revenue has started growing. The story of how a sinking ship righted itself could offer insights for other other social media sites trying to clean up. Plus: Ripple effects from cutting down flights to China, Casper’s IPO and more from Kai’s conversation with Janet Yellen and David Malpass.