All along, they have been using what some may consider "black hat" type of tactics in order to distribute their non proprietary type of software. No one signs up for index pages voluntarily.
And while they were in the cyber security space, no one really cared. But with the Bidu's search engine nested inside their page, Bidu finally noticed and will not stand for it. They woke the sleeping giant.
Bidu's engineers will now destroy Qihoo and create their own secure browser which will put Qihoo where it belongs, in the history books with all the other crooks.