I saw this on one of Amazon's Discussion boards yesterday.
YES they should get reviews, but people need to be honest in reviewing the books. If the book engaged you, was interesting, if you enjoyed it, then write a good, warm, glowing review of the book. If on the other hand the book was unmitigated crap and even though it was free you felt it was an utter waste of your time and you couldn't get past the third chapter, then go back to where you got it and review it honestly. If I get a bad review I am going to pay attention to that and spend more time working on perfecting my craft of writing, editing, and polishing the next book to make it better. I do that anyway, because I want to be a Great Writer. I want the day to come where Agents are calling me...