Hi welcome. I don't know if you meant mystery shopping shops or actually mystery shopping companies. I did not use the reference for any mystery shopping jobs since you will be considered an independent contractor and not as an employee of the mystery shopping companies that you signed up with. You can sign up with the mystery shopping companies that are listed on the bottom of the page, they are free to join and find some listings/shops that can be shopped in your area. Read up on all the info of what is expected of you as an independent contractor.