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?
Every rating wants to get aproximately 1 BTC for priority view in search results. They will never check where this money came from, they just need to make profit.
Yeah right, most of ico rating sites now only want to earn huge profit, even if the rating is not high they will make it high ratings for the sake of the money, in this kind of industry, money matters a lot.