They seem biased to me. A friend of mine who's doing an ICO told me that they paid 10ETH for 5 quality ratings and that's that! I noticed that some ICOs with good project, team, and good social media presence are struggling with getting good reviews.
With all that said, should it still be a factor to look at when investing in ICO?
ICO rating sites can not be trusted, listing ICO on this site costs a lot of money, so who pays more, receives better rating. Thats all, they do not do objective research and review about ICO which pays them a lot. It is only about marketing.