they just give the ICO only rating based on what is shown on the outside only. whether the result is unlike anything they would not know about it. so I guess the rating as it will not be a guarantee for the ICO can succeed. better believe it and analyze its own course because it will further add to the experience.
Even some ICO rating site just give good rating to any ICO that pay them well to advertise their ICO into their website so yeah it's pretty much a reviewing media that has really low credibility because the money involved into this one.
THere might be plenty of them that is still "fine" out there but Im not risking it, majority of them are exist for money grab by offering their website to ICO developer, I would prefer analyze it myself so that I can 100% sure.