I see trading reviews as a way to let your project be known even in a small way. There are 350 entries and it is not humanly possible to rate them all by one person, so I find this a way to rate games that maybe go unnoticed for different reasons. I'm honest with every game I review, if I think something is not right I tell the developer what could be improved and what can stay. I also played some games that interested me in the submission tab but having a smaller group of entries to choose from can help manage time and make your game be played by more people.