According to whitehatsec , Qihoo was caught cheating in a quality assessing certificatoin. The fact that there is a linux version for their product seems fishy to me in gereral. As an actual reason for deletion however I could come up with . A whole compendium of really bad marks for security software.
 https://blog.whitehatsec.com/hackerkast-34-soho-routers-hacked-3d-printed-am...  http://www.theregister.co.uk/2013/02/01/qihoo_government_warning_fraud/