It's not like it attracts them... us. Its just that we are more visible there, and more open with it. There is huge amount of Manga & Anime fans here as well, other groups are less visible, because they do not have such obvious avatars/names. Pony, furry or an Anime character on av is way more noticeable. Not to mention, all three of the groups are sociable among themselves, and like to group together, so game like this is really good for this.