Based on the quality of reviews on a number of prominent websites, it's not surprising to see ICO teams pay "experts" to write positive reviews.
This includes those promoters on social media who may have ulterior motives.
For the full article highlighting the issue of buying ICO ratings read below:
https://medium.com/alethena/this-is-how-easy-it-is-to-buy-ico-ratings-an-investigation-13d07e987394
