Audience member argues four devices per user is still generous — most people use one or two at a time. Andrei answers that it fits the app's specifics: users log in from desktop browser, mobile browser, iOS and a soon-to-launch React Native app (iOS + Android), the business client requested that number, and the history of login-session data suggests four is a reasonable compromise — accepting that 100% prevention of account sharing is impossible anyway, with limited revenue impact.