For your info:
I am the operator of the "privshield" exit. I just got notice from my hoster (5gbps.com) that their backoffice admin panel was compromised. Indeed my firstname and password to the admin panel have been changed. Fortunately, I have SSH on my VPS configured to only accept public key-based logins, and see no signs of entry of the VPS.
As the backoffice panel provides direct console access, there is a slight chance they logged in directly by a safe-mode boot, but my uptime is a month, and I see no dip in the tor bandwidth: https://atlas.torproject.org/#details/DA3F7BD5428F88C79C9C7006B791982DA01154...
However, as a precaution I have shut down my tor exit. I will request a clean Ubuntu image and reinstall my tor exit this weekend. I will generate new server keys just to be sure. My mail is hosted on the same system, I won't have access to this email address for a few days.
// Yoriz