Because we get this question often, I'll give a general answer to it. We have created this group because it's sometimes confusing to interact with doubles. Because when it comes to doubles, you'll have different relationships with both of them. It's also quite depressing if everyone is overjoyed to roleplay with your double and they kind of forget all about you. This was one of the reasons we created this group for. Ofcourse, we do interact with doubles, we're not that kind of people that just ignore others that joined the fandom. Though when it comes to events, we like to have the same people around, 1 of each character just like the series.
This is why events hosted by the group are for the members of the group only.
Ofcourse, we sometimes organize small events on our blogs as well. Like we did a chara change, Eru having us fall in love with random people, currently we're doing a 3 person thread with randomly chosen trios. Everyone is free to join those though, but since these aren't hosted by the group they won't be on this page. It's as simple as that.
I hope this cleared up some misunderstandings!
-- Amu