You will notice that the store has changed its name and organization. No reason to worry: Club Positif still exists on https://cpositif.com but the shop itself takes the name of the publishing house to which the club belongs, Samarkand editions.
You will thus find a more relevant separation between Club Positif, which publishes books and ebooks on personal development, health and well-being as well as books on relationships or sexology, and Samarkand editions, which deals with self-publishing, writing or copywriting and marketing.