The same article you mentioned says that 56% of US/Canada users and 70% of Japanese users have iPhones. I'd argue that monopolies should be judged on country a

The same article you mentioned says that 56% of US/Canada users and 70% of Japanese users have iPhones. I'd argue that monopolies should be judged on country and not worldwide. As each country has different iMessage popularity, apps restricted by region, earning power, phone availability, etc.