But he has also added "Installs", may be he will not get fake reviews ?
It is a deadly mistake in your way of understanding this problem
You should have better understand about reviews and their effect on an application. A real review is an assessment that is made after the user has experienced it, it is a rating based on each person. But here, a review is purchased, meaning that it is a review made not from many people, it only comes from one person, whether the application installed or not, it is still fake, it still does not contain the real information. It should be banned