Your examples do not mean much when it comes to actual influence and its use. Google relies on blatantly left-leaning "fact checkers", Schmidt was very active in HRC's campaign, Twitter actively censors Right-leaning hashtags and users [1], Facebook censor(s/ed) conservatives [2]. Do you really think actual censorship and suppression (when claiming otherwise and pretending to be objective) is less important than letting Trump takes questions?

[1] http://thehill.com/blogs/pundits-blog/media/303295-how-faceb...

[2] http://gizmodo.com/former-facebook-workers-we-routinely-supp...