In a nutshell they were forced in to taking down all content, or face a €5m fine. Rather than take the financial risk, they pulled the content.
This is of course an ongoing bloody war between torrent sites (supported by millions of users) and the big bad companies who are trying to protect their profits and control distribution.
Anyway, kill a torrent site and more will appear – that’s just how it rolls online. Another one bites the dust today but here’s a list of some alternatives (thanks to torrentfreak).