Mystery shopping is real and it is an entire industry unto itself. Never, I repeat, Never pay anyone to do this. There are many companies that are reputable in this area. I've been doing this for years and it is how I fund my "entertainment fund". Like anything else, you will have to give it time, and you will develop a reputation and you will get more shops than you could ever finish. Try National Shopping Service, they are legitimate.
I'm not familiar with Shopper Systems per se, but a friend of mine was a mystery shopper for quite a while and she loved it. She made excellent money and was able to shop to her heart's delight. Maybe someone else will jump in and let you know if this is a scam or not. Hope it works out.
Saw an add for Mystery Shoppers by a company called Shopper Systems. They state you can earn up to $150 a day by judging retail and dining establishments. This sounds really appealing.
Anyone have any experience with them? Is this for real or is it another scam?