It's common that most site where you can download apps has category feature. Category feature helps a lot of players to find the kind of game they want to play easier. It's really hard to find a certain type of game in play store and when we found one, we immediately open this site to find the game, only to find out there's no mod about it here and then we go back to playstore to find another game. If this forums has category feature players can easily search their favorite kind of game, let's say Adventure for an example or maybe City Building without opening the playstore and appstore just to find a game. That's the reason why I think category is very important.