I think that what Tryskell said it's the most obvious here. L2OFF devs will have copyright problems and such. Although, I think all of these 3 options somehow they gonna have problems because the game it's not owned by them but from NCSoft so I don't know it's fucked up. If they wanted to cause any problems to the devs they would already have done it. Since they don't either, they don't care or devs giving a serious huge advertisement for their product (NCSoft - Lineage II)