This is Platformer, a newsletter on the intersection of Silicon Valley and democracy from Casey Newton and Zoë Schiffer. Sign up here. Last July, as the Instagram feed began to fill up with recommended posts, the company was thrown briefly into crisis. The once-familiar landscape of friends, family, and influencers you had chosen to follow had begun to be replaced by algorithmic guesses. “Make Instagram Instagram again,” opined Kylie Jenner. Many viral tweets followed in the same vein. “When you discover something in your feed that you didn’t follow before, there should be a high bar — it should just...