This kind of viral marketing is the central factor behind the stunning growth of sites like Facebook, Twitter, and Plurk in just three or four short years.
這種「你找我」、「我邀他」式的病毒式擴散傳播，正是 Facebook、Twitter、噗浪等微網誌服務，在短短 3 ~ 4 年內就席捲全球的主因。