Free samples are sometimes presented as a reasonable way for clients to see your work before committing, but many freelancers find that the same clients who request them never follow through with actual work. After giving time and effort for free, you are left with nothing to show for it except a piece of work you were not paid for. It starts to feel less like a fair test and more like a way to get something for nothing. How do you handle requests for free samples, and at what point do you say no?