Did you read the article? It largely describes how he went from a small hackathon to a large hackathon to a YC hackathon to being accepted to YC.
Three distinct "hacks" in a row. Do you object to the word "hack" being used to describe the work that occurs at a hackathon, or are you just being argumentative because you prefer a different meaning?
I'm with the original commentary here. Cool -- he upgraded hackathons. I don't see how that in of itself is "hacking" the system. He didn't break ground or do anything crazy. I think people are starting to apply this term too liberally, though I'll admit the complaints (mine included) aren't going to help.
I don't think that means what you think it means.