Here's a tip for you (I am not registered with them, so I cannot help you that way)
Come here and read all about a company you may be interested in. That way, you can decide if you want to shop for them. Here's a link to a few discussions about that company.
Hello Lo, Ipsos has changed it's operations team from last year and are now paying at a much faster rate. We appreciate you registering at our site as a Mystery Shopper and hope to keep you engaged in our shops!