Online trend analyst George Liu notes that unlike past social networking sites, which relied more on word of mouth to draw in like-minded users, these new services are more about actively pulling users 'friends in by essentially casting a net across their whole social network.
網路趨勢專家劉威麟分析，有別於過去社群網站以「人傳人」方式，吸引志同道合的網友加入互動；新興的微網誌則進化到「人拉人」，主動出擊，將使用者的人脈關係一網打盡。