L’ultimo numero di Forbes contiene un profilo dettagliato di David Karp, il ragazzo dietro Tumblr. Fra gli argomenti trattati come, direi finalmente, riuscire a rendere economicamente sostenibile il sito (non guadagna a sufficienza, non al momento):
The company finished 2012 with $13 million in revenue; the hope in this “leap” year is that it’ll get to $100 million. […] Tumblr spent an estimated $25 million on its operation last year and will likely have to shell out up to $40 million this year. In 2013 David Karp has a race on his hands: Can he break into the black before needing to hold his hand out again for investors?