Great example of this is Buffer app that makes $2MM from ~16K users and 1MM free users: http://blog.bufferapp.com/from-0-to-1000000-users-the-journey-and-stat

Great example of this is Buffer app that makes $2MM from ~16K users and 1MM free users: http://blog.bufferapp.com/from-0-to-1000000-users-the-journey-and-statistics-of-buffer http://blog.bufferapp.com/from-0-to-1000000-users-the-journe...