“The greatest companies (by market capitalization) today are certainly examples of achievement in customer creation,” Dediu writes. “Facebook, Microsoft and Google are members of the ‘billion user club’ or companies that crossed a billion active users.”
“But do they really have a billion customers?” Dediu writes. “Apple does not offer a figure on its specific user count, but we have some viable proxies: iCloud accounts reached 782 million in February 2016; iTunes accounts reached 885 million in September 2014; Active devices reached one billion in January 2016. That number is likely above 1.1 billion now.”
Much more in the full article – recommended – here.