Back in 1998/9 I was Director of IT of a tech company in the valley. IT, as always, was resposible for deploying all corp machines with the std image.

I was following what was happening in the valley at the time - and everyone used Yahoo!.

I went through and replaced all browser homes with the new and scrappy Google.com as the main search page.

I deployed this on all new machines as well, and I educated users on why this new, minimal site was better.

They ALL started using Google from that point on (~400 employees)

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This is the same thing that needs to happen here.

Get an IT manager to set the default page to DDG and educate the users.

(CAVEAT! -- users are far more informed now than then, back then people hardly understood the internet's potential, let alone WTF a search co was -- so telling the avg user "google is bad, DDG good" will be more challenging than then...)