Google can't detect scam or to recognize if a certain project has a good reputation or not.
It couldn't even check if reviews are true or not.
However, regarding Op's query, you can always chat their support team to ask for assistance.
Their raters should be able to do it tho. Raters can rate ads as negative if it is a scam, such as a phishing site. Even though this depends on their knowledge too, they should at least research the legit site and confirm if the ads don't mimic it. If they failed to do it then their payment will get reduced or get removed from the project.