Tumblr on verge of raising up to $100M with massive $800M valuation
Popular blogging startup Tumblr is close to raising between $75 and $100 million, with an incredible $800 million valuation, says the Wall Street Journal.
Tumblr's blogging platform emphasizes its ease of use and now hosts more than 27 million blogs. Fashion and photography blogs are especially popular on the site because it pushes strong visuals. A reported 20 percent of…
This is an old article, but I am curious about how tumblr will generate revenue.

150M active users
http://expandedramblings.com/index.php/resource-how-many-people-use-the-top-social-media/