Upworthy isn't the first newcomer to post impressive traffic numbers. Yahoo, Buzzfeed and the Huffington Post all rack up eye-popping totals. Business Insider, the Gawker network, the Vox Media network and Mashable also managed to build huge audiences from a standing start. But Upworthy is different.
I'm not sure that Facebook likes are necessarily a key performance indicator for media but what I think Upworthy does show is that ti is a lot easier to find and share viral content than it is to write it.