At the top rated was the film The Conjuring with a 4 1/2 star rating which is extremely high because not many films are rated that high and have that good reviews. This is a 2015 production so it got a really good rating very recently and still has time to either get even better or drop in ratings. I researched on this website because it is a very reliable and frequently visited to order films because of its reliability. another film that is close to the rating of The Conjuring is Housebound which is also a 2015 production so this film also has time to either get better or go down in their reviews or/and ratings.
IN CONCLUSION...
Because paranormal is the best-selling we have decided to do paranormal as our sub-genre.