Mr. Karp had assured me repeatedly that Tumblr is incredibly easy to use, comparing it to other blogging platforms, such as Blogger, that set a certain level of expectation for what a “post” is. Or as Mr. Sabet put it: “I’ve seen friends and colleagues start blogs and then abandon them because they’re too difficult to use or they create a type of publishing system where you feel that you really have to write something profound every day.” (“If blogs are journals, tumblelogs are scrapbooks,” according to the Tumblr website.)

— Tumblr’s Founder