Immediately after its publication, this book took first place on Amazon among books on marketing and customer service. Generating a source of regular revenue for a company is an important task for every entrepreneur. With so many different types of subscription-based business models to choose from, there is something suitable for every industry. Subscribers, in any case, are much more valuable to the company than ordinary customers. This book is for everyone who wants to build a business model that brings regular profit. It is published in Russian for the first time.