Also, in the FAQ on their homepage it says this:
Q: Why should I have to pay for this service?
A: It is true, you can find some of these jobs on other job posting boards. However, after searching hundreds of sites (which might take hours) to find a mystery shopping opportunity to apply for, you could have already completed two shops. ShopperSystems is NOT a mystery shopping company, we compile jobs from hundreds of mystery shopping companies around the country and provide these opportunities to you in one simple location. Your membership fee gives you access to our extensive database, as well as access to EXCLUSIVE opportunities to our members only.