From what I got off the search engines, one online publication say that Netflix did so to 'test' it's security ( but some way to do so ); I'll provide the article in question:
Reference source -- Netflix lets backend get hacked to explore future features- The Inquirer
Offhand, that's some way to 'add a feeling' this Christmas season *facepalm*
EDIT: Aside from the news link above, Netflix Blog mentions of it as well ( under the click-link "Netflix said in a blog post" -- The Netflix Tech Blog: Netflix Hack Day