Does that stay like that if you've been a member, but didn't train any of the member skills? If being a member at any point would change that to showing the amount of xp, then this would be a very simple way to prove if someone is pure F2P or not. Yes, if you didn't train some of the P2P skills while you were a member and are now F2P, those untrained P2P skills are still shown as "Members' Skill." But if you gained even a single xp in any of the P2P skills, the stats interface will display the current xp regardless of whether you're F2P or P2P.