If you are not ready with any feedback, dont even create or announce your project/offer anywhere. Positive or negative feedback comes anywhere, it is common thing in this online world. Big trusted site is even getting negative feedback as well, but they do really like negative feedback as long as the feedback is real.
Back to your offer, you say that an operator may earn up to $20k USD/week. How it can be possible? Mind to give details?
The site you are referring to is not even showing that the site have good amount of bankroll. Why? It has so bad translation, I can say that the translated mode is using google translate only.