This offer is still available, reposting as a reminder :)
Earn $5 instantly when you sign up to take surveys with iPoll. As an iPoll member, you’ll get paid for your opinion and can earn Free gift cards, magazine subscriptions and cash! Surveys usually take 15-20 minutes to complete. They’ve added the mobile app so you’ll always be able to earn rewards.
From the site: The purpose of our surveys is to gather important feedback from research members just like you. Your opinions will help companies enhance products and services as well as create new innovations. There is no fee for your participation—in fact we pay you for each survey you complete.