Just a quick response here to say

1.  The site is not being hacked or security compromised in anyway. The programmers will take a look at the coding to make sure there is not a coding bug causing any skewed ratings but no one can change ratings or alter them in anway, not even staff:)  The ratings are done based on a 'standard deviation' system so that could be the cause of some of the confusion on how the calculations work. I'll explain how it works in detail when I get all the exact calculating details from the programmers.
You can look at the FAQ on how the ratings are calculated on the TOP 100 as that might give you an idea on how it works..
http://www.renderosity.com/mod/service/index.php?questionid=255

2.. The checkout pages at Renderosity are SECURED pages and not a security risk at all .  You can see this for yourself when you are at the checkout pages. Credit card information is NOT stored at all on our site. 

Please do not let this thread start making you question the security of the site, if there is a problem at all it would be an issue in how the coding is working and the programmers will research and resolve if its done working the way it should but it is NOT a security issue.