“Today, Tumblr—which is beloved by its users for its clean interface, ease of use and community elements—has 170,000 registered users tumbling along; Mr. Karp hopes to take that number to one million by the end of 2008. In October, Mr. Karp sold 25 percent of the company to a small group of investors, which include the venture capital firms Spark Capital and Union Square Ventures, and betaworks head John Borthwick and Vimeo founder Jakob Lodwick. At that point, the company was valued at $3 million, making Mr. Karp $750,000 richer. (He was originally offered $1.5 million for a 50 percent stake, but turned it down in order to retain more control over the company.)”—Doree Shafrir’s article, Would You Take a Tumblr With This Man? in The New York Observer on January 15, 2008.