They put themselves out there. Use goes hand in hand with evaluation, and if people use your web app and think it sucks they will let you know. I think it may

They put themselves out there. Use goes hand in hand with evaluation, and if people use your web app and think it sucks they will let you know. I think it may also be that the Cuil founders have stated that they think their search engine is better than Google's. When you ask to be measured next to a titan and come up far short your are begging to be mocked.