That just sort of turns my stomach, the thought of ever having any brand linking on the dashboard taking people out of Tumblr. Anyone with a blog on Tumblr can promote content in their posts, can put any ads they want on the blog. The idea of ever forcing them to put something on their blog — the spirit of Tumblr is that you are totally in control down to every line of code. The idea of changing that really turns our stomach
David Karp, on forced advertising on Tumblr during an interview. Thank you David Karp. Tumblr users appreciate it.