This is a competition to win £300. You need to complete the survey and then get entered into a prize draw. They say it takes no more than 10 minutes but I have just completed it and I would say it takes no more than 5. You do have to give over your email address, but that is just so they can contact you if you win. They say they do not share your details.
Only conditions are that you are over 18, a UK resident, internet user and that you answer ALL questions