Acknowledgments
This book represents the combined efforts of a number of people.
To the reviewers, Michail Katkoff, Kenton Kivestu, Ryan Hoover, and Stanislav Beremski: without your input, this book would be of far lower quality. Your help is greatly appreciated.
To Thorbjörn Warin and Jon Jordan, who helped me convince a publisher that a book about the freemium model would be not only salient but timely: without your assistance, this book would not exist.
To the book’s illustrations and diagrams artist, Vladimir Šipka: your contributions to Freemium Economics are invaluable. Your speed and good nature in taking revision requests significantly reduced the stress of the writing process.
To my girlfriend, Päivi Pütsepp: your patience with my ...
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