They do this because if they were even handed in who they let review, it would get bombed before the masses could buy it, and in turn they wouldn't buy it. So they have to prime everyone into thinking it's good, trick them into buying a shit product. They will discover on their own but thats AFTER they already spend money on it. And then when the audience hates it, the makers will gaslight and hurl insults at them. "It really IS great, you're just too bigoted to appreciate it!"