Together, the contributions of many add up to create compelling and useful experiences. You may be inspired to post one time or several times a day—either way is okay. If you’re more ambitious, you might create a collection of your own.
from 'Welcome to Medium — About Medium — Medium'.
I like that they're trying something a little different.
Obviously the problem comes with trying to explain a new concept. How is it not just Tumblr? The only way to find out is to have a play. I'm going to do that now.