The Number of backlinks needed to rank can vary. It depends je the competition and the quality of the backlinks. We also ran année experiment. It tested if removing backlinks to a few pages would affect their traffic. Traffic fell after we disavowed the backlinks (told Google to ignore them). https://sociallytraffic.com/story3014905/communication-digitale-choses-%C3%A0-savoir-avant-d-acheter