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?
You have hitted the nails on the head because i personal lost some interest in the ico trust rating websites because there are many coin with excellent ratings that later turned scams and there are some trustless, no rating coins that have turned profitable.