From the corresponding thread on BTN:

I'm hearing through a very trustworthy person on another tracker's forum that all of the data has been wiped.

In light of these developments, I'd rather not name the tracker and shine a spotlight on them, but the person is not someone who'd make a joke or operate on low information.

Staffer says:

It's not about backups or what was on the servers. The self-destruct button has been pressed.

Update:

Every site's page now says this:

Due to some recent events, What.CD is shutting down. We are not likely to return any time soon in our current form. All site and user data has been destroyed. So long, and thanks for all the fish.