Substack is updating its peer-to-peer recommendation system, the company announced today. With this new update, Substack is helping writers aid other writers in expanding their reach and potentially getting more subscribers and followers, as the company is now allowing writers to curate and share a list of publications for their readers to subscribe to. In a blog post, the company says the change represents a step forward and away from an era of social media that is based on “centralized discovery and control.” By allowing writers to recommend a network of other writers to their subscribers, Substack is fostering a...