Quote:
* violate the contractual, personal, intellectual property or other rights of any party, or promote or constitute illegal activity; You have no property interest in Habbo® Credits, Premium Subscriptions, your avatar, virtual items (e.g., Habbo® Furni or rares), which remain the exclusive property of Sulake subject only to your limited, non-transferable revocable license to use such for in-game play subject to these Terms and Conditions of Sale and the Terms of Use.
Okay to violate the intellectual property would be to breach their copyright without permission. This doesn't happen. To have no property interest just means they retain the right of beneficial ownership of the items and as a habbo member you have a licence to use them in the game of habbo. This is quite common for virtual games. You could not possibly play with the items outside of the game anyway. Every member of Habbo has a licence to play with them so I don't see any bar on trading just that your licence to play is non-transferable. This makes sense as account trading/selling is not allowed and neither is trading for cash. Nothing I can see backs up your argument that you cannot trade habbo for RS or vice versa. The rules are quite clear on Runescape now as Wiizz pointed out. If it was I am sure Habbo would be in contact about it.