Regardless of the total volume (and I'd say 3% of all games is still fairly substantial), adult/dating sim/visual novels seem to flood the "Popular", "Top Sellers" and "Top Rated" searches for certain tags because they are understandably popular, but if I'm looking for a genuine horror game then I don't really like having to sift through all the vampire porn games and zombie dating sims. I can turn off Adult content, but that hides a lot of genuine horror games too.