The newsletter start-up, which once drew an overture from Elon Musk, is betting on politics content and recruiting stars. But profits remain elusive. Politics and Government, Social Media, Writing and Writers, News and News Media, Mergers, Acquisitions and Divestitures, Presidential Election of 2024, X (Formerly Twitter), Substack Inc, Hasan, Mehdi (1979- ), Musk, Elon, Silver, Nate, Richardson, Heather Cox, Todd, Chuck (1972- ) The newsletter start-up, which once drew an overture from Elon Musk, is betting on politics content and recruiting stars. But profits remain elusive. NYT > Business