Surveys that involve writing on a plane, a restaurant, pub or hotel that involve you doing some work for a promise of a prize entry. I want a reward not a possible prize. The least they should offer is a free drink, pen, key ring whatever, but I ain't working for nothing. The worst I can remember was a holiday hotel in Majorca that did an afternoon quiz. I sat there for nearly half an hour, won the quiz, beating a room full of people and was gobsmacked that there was no prize. The tight gits could have given me a cheap pen, drink, voucher and I'd have been fine but nothing. WTF?