Membership surpassed 1 million by March 2012 and the registered book count exceeded 8.5 million. By November 2019, there were over 1.9 million members and over 13 million books travelling through 132 countries, of which over 25 thousand books newly "released in the wild" in the previous month across over 60 countries, with over 80% of the books being released in the 8 most active countries (Germany, United States, Spain, Italy, Australia, United Kingdom, the Netherlands and Brasil), while 30 countries had seen a book release in the previous 3 days.