Funny, I love Shadow Shoppers. As a new MS I signed up for a trial month at $4.99 and I have gotten tons of job opportunities in my email. In fact, I have gone on 3 jobs since I joined and has more than paid the $4.99 fee.
However, I do not think I will continue with Shadow as I have now registered for free with over 50 companies (which were most graciously supplied on this website) and I have no need for Shadow Shopper to find me jobs. I'm not going to lie and say it hasn't been grueling filling out all those apps, but it brings me peace of mind that I have at least attempted to do something good for myself.
I wish people would stop calling Shadow Shoppers a scam operation because that is not the case at all. They are like the Employment Agencies that find jobs for people and the people that get hired either pay the fee or the employer pays it. No big deal and it is not a scam. Sometimes the best jobs come to people that way.
The ones that are scams are the ones that make you click on their advertisers before they get to the meat of what you want and then they want money from you to sign up as a shopper. I don't do that.