Make the rating system more scientific. Just ask whether this is a Above Average, Average, or Below Average Rifftrax. Normalize the scores from 1-10 based on this feedback. Right now, some people interpret the rating as "how good a rifftrax is this" and rate from 1 to 10, while others rate 7 to 10 because they are rating it in terms of "how satisfied are you with this purchase".