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?
i would not believe rating sites, but it's a good place to start getting information about projects, all-in-one place, and always necessary to look
several sites, if it possible