Yes they are, unless someone intervened in giving an honest review about the ratings that affects the review and can not be changed as their wish. They did something shady in the back but it does not mean they are completely useless because on their exchanges we can gather information regarding the project or important links about the project without searching it. And we can find the detail about their tokenization on their exchanges too, this is why it is very popular. This is a good place to get information regarding the project you are looking for, of course besides the rating.