INFOGRAPHIC: Explosive Active User Growth for Pinterest, Tumblr

Pinterest and Tumblr were the fastest-growing social networks over the past year, while Facebook was the only one to see its active user numbers drop, according to a recent study by GlobalWebIndex.

Pinterest and Tumblr were the fastest-growing social networks over the past year, while Facebook was the only one to see its active user numbers drop, according to a recent study by GlobalWebIndex.

@9Number9 david.cohen@adweek.com David Cohen is editor of Adweek's Social Pro Daily.