The surveys are sent to you based on your profile. Its a good idea to fill out the profiles to increase your chances of receiving paid survey invitations. If you attempt, but do not qualify for the survey you are automatically entered into a monthly sweepstakes drawing for fifty $10 prizes.
They also have a great referral system. Members receive $2.00 every time one of their referrals takes a survey and $1.00 for every survey their referral's referral completes. Best of all Survey Savvy has no minimum to request payment.
Like the other sites Survey savvy is free to do. Payments are processed as soon as you request them. Helpful support group and a good clean site. Highly recommended.