i also do some of the online surveys and as Phoenix puts it.. when it comes to a question that isnt thier business, I dont answer or I answer incorrectly. ( the income being #1 on my BUTT-OUT questions)
There are some that dont require much personal info like e-jury. That one pays 5 bucks every time you complete a jury case. Simple, easy and usually just local traffic cases, it has proven to be a pretty fun way to make some gas money.
Some of them are complete scams and offer bonus points only. Maybe 2 point per servey and to redeem them you need hundreds of points for a simple plastic spoon.
Keep looking around. ALot of times the best survey centers are simply banner adds on product sites. The best ones are private invite only.. Bellweather being one.
Set up an account from yahoo for eamil and give that one out any time you sign up for any kind of survey. Let it be your spam address and hunt through the iinvites you get , you may stumble on a great one!