> Instagram was starting to cannibalize the facebook youth userbase Tumblr, too, is doing exactly that, if you believe this January survey: http://articles.la

> Instagram was starting to cannibalize the facebook youth userbase Tumblr, too, is doing exactly that, if you believe this January survey: http://articles.latimes.com/2013/jan/11/business/la-fi-tn-tumblr-facebook-teens-survey-survata-20130111 http://articles.latimes.com/2013/jan/11/business/la-fi-tn-tu... Another survey, this one from December and including all Americans (not just teens), showed people spend more time on Tumblr than Twitter, Pinterest and LinkedIn combined: http://www.marketingcharts.com/wp/interactive/in-december-americans-spent-more-time-on-tumblr-than-pinterest-twitter-and-linkedin-combined-27046/ http://www.marketingcharts.com/wp/interactive/in-december-am... That seems to suggest Tumblr's worth more than Instagram.