Very confusing reading this on a github page. Took a moment to realize this was not github's own terms for dealing with recruiters. It is actually linked on github directly from http://vzaar.com/jobs - rather than being used to generate a page on their site. So why the github hosting? Are they accepting pull requests from enterprising recruiters who disagree with their terms?
I can imagine doing it the same way - it's a single, common document repository for the company; it's shared instead of stuck on someone's computer, with version control, and the same place as their other docs - so you learn and maintain only a single place/tool/useraccounts instead of having a separate system for everything.
Seems a bit wierd to link them to a new site though. I (In typical programmer over-engneering fashion) would be pulling the text from github via the API for display on my own ___domain.