If you'd like to try this surveygizmo out for yourself, go to Questia and try to win an 80GB iPod by taking their survey. It's actually fun to complete, and the mechanism couldn't be smoother, or less aggravating.
M. Bhoir, M. Vaidya, M. Patel, M. Ajmera, and M. Jadhav. International Journal on Recent and Innovation Trends in Computing and Communication, 3 (3):
1529--1532(March 2015)