Precisely. With research, you will know that these turned to be good casinos are certainly those scam casinos that you need to avoid in the first place. Review sites are already controlled by them, as they always leave good impressions made by some paid users, otherwise they would not gain any customers at all. Although I’m not saying that review sites are not longer reliable, but in most cases they are almost made to lure new players.
There are two types of review sites.
1) The author gives the rating based on his opinion and experience. ( we can't trust as we don't know whether his opinion and rating is honest or paid)
2) such review sites. where rating is given based on user's experience and opinions could be also manipulated as companies pay money to get positive reviews to boost thier rating.