User blog comment:Bennlimos/HxH Questions & Thoughts Discussion 3/@comment-24768103-20140414013002/@comment-24768103-20140414032256

2- Did Ikalgo never have a password? Oops. In that case, I couldn't tell you. But he did know about the password system, while Brovada had no idea, so that may say something about the info he was trusted with.

4- I totally forgot that all those cards were probably actual Nen abilities, because Greed Island was actually in the real world. But odds are, that whatever game master made the cards can't actually use all of the abilities that the cards have. It's probably similar to what Kurapika did in order to become so strong (setting a requirement). The game master's prerequisite was probably that they can only use the abilities as cards (if that makes any sense). Otherwise, that would be a pretty OP Nen power.