I had no exclusivity arrangement with Eagle Eye, but in truth I rarely did any other shopping. In having nearly 200 assignments per month to do it was just the right arrangement for me. Once in awhile I would pick up some rural Corporate Research International assignments that were paying really well, but then Eagle Eye actually acquired that client that I was picking up assignments for so I ended up just getting a larger route.
Eagle Eye was my main source of income, and enough to live comfortably. I typically did my routes on the weekends, and during the week either attended school during the beginning or later in my time with them did work that I really loved (not caring about the pay).
I suppose you could do work for as many companies as you would like, but an Eagle Eye route is a lot of work, and often takes you into areas where there is limited work for others.