Do you mean it is fake rating ?
Yes mostly are, this rating can change at any time. I have encountered a few projects that were rated as 5 stars but after the project failed to meet up their softcap or proven as a scam project, the rating went back to 3 or 2 stars. Some raters on rating websites are charging for money if your project wants to get rated as a good project, not only that you can request the context that will be posted on review too.
Some rating sites are simply own by a bounty hunter, I don't know yet the owner of ICO rating but most rating sites are paid or only few people give rates and we wonder if they really do check it or find some analysis that will determine certain factors. Better do our own research so we will not regret in the end. I only used ICO rating before for checking of new projects to search if they have bounties, but now I don't visit the site anymore.