Players comfortable in Augusta National's cloak of secrecy

Golf patrons cast shadows in the early morning light as they arrive for the final day of practice for the 2019 Masters golf tournament at the Augusta National Golf Club in Augusta, Georgia, U.S., April 10, 2019. REUTERS/Lucy Nicholson

AUGUSTA, Ga. (Reuters) - Augusta National opens its hallowed grounds to the public for the Masters each year but anyone trying to learn about the finer details of the exclusive club can expect to be met with a CIA-level of secrecy.

Everything from revenue at the club's massive merchandise store, where a seemingly never-ending line snakes through the doors all week, to the attendance figures at the year's first major are considered classified information at Augusta National.