Flipsnack

Flipsnack offers a digital publishing platform that allows users to create interactive flipbooks from scratch or by converting PDFs. It includes a design studio for content creation, tools for adding interactivity, options for public and private sharing, and analytics for tracking performance. While it has many features related to content creation, sharing, and tracking, it does not explicitly mention a recommendation engine for readers or a monetization model based on member reading time, which are key 'must-have' features for the Medium concept. The platform is more geared towards businesses and marketing teams for creating various types of publications like magazines, catalogs, and reports, rather than a platform for independent writers to monetize long-form stories through a membership model.