Its best to put real info. Some of the offers might check the stuff you enter for the site (and if your stuff on the site is wrong, how will they mail stuff to you), and some like mapquest your address or something, so if you make it up, it wont work. I have done all of the free offers, and some credit-card. I got one thing in the mail, so dont worry about junk mail, and use your address.
Phone numbers might be more risky, there are plenty of forums around here explaining how to get a real, but junk, phone number to use. I used mine, and only got like one call, but I hear that ususally it is more.
Whatever you do, use the same info that you gave to gaminglagoon on your profile. If that does not match what you put in on the survey, it might make the offer get disapproved (though not necessarily), so you are less likely to get your points if you try made up info.
At least use a junk email, because whatever one you use will be worthless after this.
Anyway, good luck.
