Since retooling its newsletter strategy in 2019, the Vox Media title New York Magazine has seen its email readership—as Succession’s Kendall Roy might say—go supersonic.The publisher, which topped 1 million subscribers across its 30 email products in December, has achieved its growth through a multifaceted strategy: one that blends traditional newsletters with five subscriber-only pop-ups. These pop-ups include its popular new offering, Succession Club, a weekly analysis of the most recent episode of Succession, featuring writers from across the New York Magazine ecosystem.