I found out about Marketing Endeavors through some local news stories. They are located right here in Louisville, KY though the are progressively expanding throughout the US.
I have met several of the schedulers and they have a lot of fun doing their jobs and hope that their shoppers have fun.
So, if you have fun shopping, are detail-oriented and are willing to tell them how your experience went in great detail, apply!
Here is their link to apply: https://www.sassieshop.com/sassie/SassieShopperSignup/Signup.php?EmsID=Cii%2BY43kxRI%3D.
If you want a FAQ: http://www.meshoppers.com/wst_page4.html
Here is their sign in page once you are a shopper: http://www.sassieshop.com/2me/shoppers/LoginShopper.norm.php
I believe they are fair in their payments. They are timely, though it does sometimes take about 8 weeks to receive payment unless otherwise specified. Some shops are reimbursement only, others are paid only and some are combinations.