This is called the viral coefficient, and if it's more than 1, it's 'viral growth'. http://www.forentrepreneurs.com/lessons-learnt-viral-marketing/ http://www.f

This is called the viral coefficient, and if it's more than 1, it's 'viral growth'. http://www.forentrepreneurs.com/lessons-learnt-viral-marketing/ http://www.forentrepreneurs.com/lessons-learnt-viral-marketi...