The rules of Parliament's register of interests require MPs to declare footy tickets, flights, gifts, Chairman's Club memberships, assets, investments, and any other financial arrangement that "may conflict or may be seen to conflict with their public duty." When a politician is given "free stuff", voters at least deserve to know who's trying to curry favour.
Porter obviously received enough financial assistance that he felt the need to update his register three days ago. He revealed his legal fees were at least partly paid by "a blind trust known as the Legal Services Trust". But that's all he was giving away.