Hi Sella,
I am not familiar with Customer Feedback, LLC but when I began MSing back in August of 2008 after I lost my job in March and couldn't find work, Advantis was the first MSing company I went to work for. While scanning a online job board I answered a post by Advantis for consultants. They are out of Canada and very reputable. According to an email I received recently, they are about to roll out a new program in April and if you haven't signed up with them yet I would recommend doing so.
Over the past nine months I have signed up with more than 70 companies but I only really work with about 12 on a regular basis and I think that is pretty typical. You develop a rhythm for certain shops and like doing those above others. Maybe they pay more, offer bonuses, include reimbursements for items you already use and would purchase anyway, or the paperwork isn't very time consuming. But, for whatever reason, you gravitate towards those to the exclusion of others and that keeps you working with just a handful of companies. In order to find these dozen or so companies to work with you need to sign up with a great many.
Anyway, Advanis is a good company to work with and, if I remember correctly, they paid every two weeks.
Good luck!