Definitely questionable and the biggest issue is that you should always assume they bought the coins they are talking positively about to then sell them after you read their ratings. Not very good.
I personally look through some sites with ratings from time to time. But I don't completely focus on them because not all ICOs with high ratings are guaranteed to be successful. I rely more on the team, the telegram, wp and so on
For me, the most important criteria are an experienced team and a link to the GitHub (it's bad that no links). I also draw attention to the white paper - its design, and its text.