I don't mean to harp on osu! or anything, I love the game. I'm just curious how all of this is supposedly legal. How does osu! not get in trouble with copyright issues assuming that osu! doesn't have the permission from every single song artist who has their song mapped in the game? I would think the whole "fair use" clause would be a bit too much of a stretch in terms of legal defense, especially considering that osu! does make money off of supporter tags. Can anyone enlighten me?