When it comes to search results, Qihoo Search provides mainly the same Baidu experience with access to their software downloading platform. They do not have a paid platform just yet, however it’s quite likely they will partner with Google. I think this would be ideal for Google.
When you look back at Google's exit from the Chinese mainland a few years ago, they did it for reasons not related to revenue. Partnering with Qihoo Search allows them to benefit from the revenue earned in the huge online economy of the mainland without having to be present.