I saw another name for viral growth factor K-factor K-factor = i * c i = number of invites sent by each customer (e.g. if each new customer invites five frie

I saw another name for viral growth factor K-factor K-factor = i * c i = number of invites sent by each customer (e.g. if each new customer invites five friends, i = 5) c = percent conversion of each inbvite (e.g. if one in five invitees convert to new users, c = .2) http://en.wikipedia.org/wiki/K-factor_(marketing) http://en.wikipedia.org/wiki/K-factor_(marketing) Viral growth appears when K-factor > 1