When i search i found ICO projects with very good rating, this rating posted buy ICO rating websites, how this rating works, websites did not mention about the factors use to rate this projects.
As I have seen in a few, there are several experts on the site, and they are the ones that votes ICOs. They are also often not known people by community. I doubt they are reliable, because a few times I have seen that they have listed scam projects and rated well. I think this is enough evidence to avoid following these sites. Right? Do your own research and never trust anyone else.