Pokemon Go’s Daily Active Users (DAU) on a Decline
Luke Kawa and Lily Katz, reporting for Bloomberg;
Data from Sensor Tower, SurveyMonkey, and Apptopia, however, show that Pokemon Go's daily active users, downloads, engagement, and time spent on the app per day are all well off their peaks and on a downward trend.
Hopefully these updates from Niantic will help. Also we have to remember that the game is yet to be "officially" release in China and in the Middle East.