This guy answered your questions simply but truthfully..remember in this community MONEY is what dictates everything,so you have already an idea about them being Paid to make good feedback in any ico,but mate is right thats the reality of being here.
Newly generated ICOs are doing everything they can just to market out their project/product. And we all know that newbies are looking for reviews from this, that, those ICOs that they viewed on the web. But I'm not removing the fact that there are reviewers/bloggers/rating sites that legit giving a helping hand to the newbies who just want to learn more about investing in crypto/ICOs. Sadly majority of the ICO rating/review sites are in favor of giving themselves and those listed ICOs benefits for each other.