I'll do a survey, but there has to be some value in it for me. You'll toss me a few hundred points or miles for it? Sure, I'll give you some of my time for that.

I'll even do a survey for free if I want to help you improve your business. Usually that happens when I've had either a strongly negative or strongly positive experience. Strongly negative, I want to let you know what was wrong so you can correct it. Strongly positive, I want to help those who made a difference get recognition.

One thing I will not fill out a survey for is "...a chance to WIN one of these great prizes!" The expected value on survey drawings is usually terrible. Sure, the prize is often a few hundred dollars, but if there are $1000 prizes of prizes total and 100,000 (conservatively) entering, my EV is a cent. "Chance to win" surveys are so bad it's usually not even worth pausing to figure out how bad they are.