Here is a link to the summary from when it happened: CGC Employee's Astroturfing E4
I personally think this is a reason to not use cgc. To put into context how insane this situation was, ever major company has or had an account on this site. Even down to the small no name start ups. None of them ever did this.
These cgc employees knew exactly what they were doing, and it only stopped because I caught them. Some of the accounts go back over a year. Also these are just the accounts I could find. There were so many alt accounts with identical ip addresses. The whole situation was completely inexcusable.