I'm signed up and have been for a while. I'm invited to participate often too. The only problem is that the studies are always scheduled in Mountain View during working hours. So basically, their research is all skewed to people with no jobs or responsibilities. The $100 gift cards won't make up for the time and pay lost to go to one of these.
Shape the future of Google. Tell us what you think about Google products and features by participating in our user research studies. You’ll get a token of our appreciation plus the chance to help build something you’ll love. Sign Up …