1) Why do you think their results would get better if more people use their engine?
2) If their results really are better than Google, as you claim, why is their user base so small after all these years?
3) Why should we trust them any more than Google? How do you know they're not actually collecting your data or passing it on to the third party engines they use?
1) More revenue -> more developers -> more deep web onebox results.
2) Result quality is trumped by inertia and ecosystem stickyness (I commented above)
3) They have a smaller team and are focused on one product, which means they can survive without doing this. Also, the risk of detection is high, since it relies on hiding revenue, third parties that keep secrets, and the US never issuing a subpoena for their logs. In contrast, Google would go out of business tomorrow if they stopped collecting and monetizing data.
1) Why do you think their results would get better if more people use their engine?
2) If their results really are better than Google, as you claim, why is their user base so small after all these years?
3) Why should we trust them any more than Google? How do you know they're not actually collecting your data or passing it on to the third party engines they use?