Reviews can make the difference to a product’s sales.
A bad review in a newspaper can close a play.
A lot of cinema goers will check a site like Rotten Tomatoes to find out what the critics and the public think of a film before deciding which movie to watch.
Car dealers offer test drives – a short term review copy – to help individuals decide whether to buy a car.
Reviews work. Especially honest ones. And they can be a relatively easy way to make affiliate sales.