Someone wrote that these ratings are easy to buy and correct. Posklko rating consists of an assessment of experts, paying one expert can increase the rating of the project.
Unfortunately did not find the link where it was written.
This is a well-known fact. I also met an article about how a low-grade ICO got a high rating for a separate fee on one of the leading sites of ICOs trackers. It is better to do the analysis of projects.