There are many that believe that if you promote a scam, you can be considered scammer.
And honestly, they are not that far from truth in my opinion too. Just sit back and think about it like it would not be about you, I am sur you'd understand this point of view.
Now, a feedback rating is .. personal. If one think that you deserve a green, you'll get his green; if somebody thinks that you deserve a red, he'll give you red.
People can read the reasoning behind your feedback rating and think for themselves if you deserved it or not.
I believe that the way you started this thread will not help you.
Try to find out more about that site you are advertising, try to discuss nicely with your opponents and .. try to make the correct choice.
I hope that this helped.