I just got a private PM from someone with the account 'JAG CORP AJA'. They noted that 'we can noticed a certain maturity...' and then they offered me the chance to fill in a player moderation form for the chance to become a player moderator. I decided to '???' back to them for a response and when they replied I noted that they are a free account and there was not a crown on their chat. They told me that if I didn't trust them I didn't have to fill in the form and that they had a lot of players waiting.
Jagex never offers that, you receive an invite via your Runescape account mail so it was a scam. I reported them for impersonating staff as the name does try to give the air that they are official Jagex. You can check out the Safety & Security Guidlines - Scamming Prevention Guide for more information.