Before revision:  Illustrating the methodology with  facebook, one of the biggest of the social-media giants , we find a clear signature of a change of regime that occurred in 2010 on the growth of the number of users, from a pure exponential behavior (a paradigm for unlimited growth) to a logistic function describing the evolution towards an asymptotic plateau (a paradigm for growth in competition).
After revision:  Illustrating the methodology with a detailed analysis of facebook, one of the biggest of the social-media giants , we find a clear signature of a change of regime that occurred in 2010 on the growth of the number of users, from a pure exponential behavior (a paradigm for unlimited growth) to a logistic function describing the evolution towards an asymptotic plateau (a paradigm for growth in competition).