Hey had an idea that might help the ‘low rating’ problem.
1. When a user buys a file, they dont have the option to rate straight away, this will stop other authors from buying a file and rating 1 star instantly just to destroy competition. (i know it happens because its happened to me)
2. After a set time (possibly 24 hours?) the file can then be reviewed, this involves the user leaving some feedback about their experience with the file and they can add a rating to this review which will be shown next to the review along with the buyers thumbnail image and name.
3. reviews will be displayed in a seperate tab from the comments so each file has comments and reviews.
4. each review has a ‘dispute review’ button on it that only the file author can see, this will allow the user to email support with the review ID in case it is a blatently unfair review.
5. the average rating from the reviews is displayed next to the file just as they are now.
6. ratings cannot be made without leaving a review.
Just a thought 
Jay
Posted 2 months ago