I occasionally have users with problems due to trying to import into a non native program that I don't have access to and the program has messed up the model in some way. They almost always ask for help but sometimes they just immediately leave a negative rating and comment and I think they do that because they are phishing for a refund and they've lied about whatever issue they've had. Users should have to provide evidence along with their comments and rating which is then reviewed by cgtrader and then a chance to contest and is only posted if you can't