I have been shopping since March of 2006, and after a slow start, I now have more jobs than I can handle. As much as I hate to do it, I have to turn down quite a few.
I have never paid a cent for any of my jobs, and I still don't think it is necessary. I tried Shadow Shopper for free, and as was mentioned before, I was never allowed access to any of the job lists. What kind of "Trial Membership" is that?
It's true, I had to fill out a lot of applications, but I didn't do all of them at one time and I did use RoboForm. However, it has been worth it because I have several who contact me regularly and I could work every day if I chose to, without paying for the privilege.