Hey Erika,
I have never worked with Linda's company, BUT I do know if you put "linda townsend" in the search box at the top right of your screen, you will see a list of people who have her listed in their resumes. Maybe you could email them and ask them about their experience with her? If you don't feel comfortable doing that, maybe you could look at the resumes they have in their profiles or look at their imdb profiles just to get a sense of how many projects they work in a year and what types of projects they are doing. Just a thought.
I have also heard that exclusive agreements should usually be avoided, so I totally understand your concern.
Hope this helps!

Thanks Rachel. Thats a good idea.