I have been trying to sign up with them for months now. I always get a message saying "Thank you for applying!
Thank you for applying to become a shopper with SQM
We will contact you by email or phone when we are hiring shoppers in your area."
Just added some Ohio shops. So, it looks like it may pay to sign up and wait for them to get to your area.. Their US shops that I have seen tend to be in large cities. However, other forum members may know about others.
Based in MD, near DC
Shopping from the Carolinas to New York
Have video cam; will travel