I always judge whether or not a project is good by doing its own research, because I have never believed in rating a website, their website rating is a paid website, and they faked the rating of the project because they were paid
Most of rating sites give rates for projects based on how much payments those projects pay them. Consequently, there are significant biases on ratings of those sites. I don't believe on ratings from third-party sites, and never take those ratings into my mind. DYOR is key thing to investigate potential of projects.
At first i think it only rumour, but since a lot of people discuss it maybe it is right that ICO rating site give their ratings depends on how project pay them and not be independent. If me since first i never see ICO rating site and sometime look from it's bounty rewards.