The Tumblr micro publishing platform continues to grow in popularity --mostly amongst teenagers and smut peddlers. Tumblr makes it super easy to post content in different formats.---text, photos, quotes, links, dialogue, audio, video. Many posts on Tumblr consist of photos, animated gifs or videos and not text. Many are simple reblogs. People signed up to Tumblr to express themselves and around 70 per cent of all Tumblr's traffic comes from inside the network, from users looking at others' posts.

I am on Tumblr here and here. I joined without really knowing much about it.

It is a popular social network for self-expression.Tumblr is a strong interest network---also see the Lensbr photographers network. This interconnectedness indicates that the social network that emerges out of Tumblr is driven by content, or more specifically, the creative works of the content creators on Tumblr. The content creators are seen as part of a community.

Tumblr makes no money. It continues to raise venture capital. Can the network can actually bring in revenue to match its growth? How can it turn itself into a profitable business? Where will the cashflow come from apart from its cut on the premium designs for blogs?