They are mostly paid, so do not pay attention to ratings. In general all rating websites are paid, so you can create whatever rating you wish, if you have enough money. Do your own research and do not trust such websites.
Do you mean it is fake rating ?
Yes to boost up their appearance. Usually those who lack in experience and new comers are just looking for trust rating platforms whenever they are about to make a decision. But definitely those platforms are just a business and no way an independent one. It is very dangerous to make a decision from a controlled trust rating platforms. It is still safe if you had your own research towards the project, and make an independent decision.