If you want to know the subscriber count of magazines, look in the back issues. Under US law, to send the magazines by the US postal service, at least 1 time per year they print a small table showing how many total issues were printed, how many were sent to paid subscribers, etc. Careful search of the last year's worth of magazines will show a table, probably 2-3 inches wide and 8 inches tall, or as large as 1 printed page with the numbers in it.