http://techcrunch.com/2013/02/18/what-is-the-harlem-shake-so-popular/
"So why is this a “Symbiotic Meme”? It’s the term I coined five years ago when I wrote my final Stanford Cybersociology Master’s degree paper about the phenomenon. When content creators serve up a meme with an equation full of variables, people remix the variables, and share the product to their own networks. The audience becomes curious about what the source content was. This floods traffic back to the original or flagship version of the meme." (Josh Constine)