Hey - sorry for delay in responding. I normally get an immediate email when someone posts here but never saw one... anyway, it's based on number of posts you have made. Next title for you is 1st Team at 323 posts. It's all about participation!
@Saint&Sinner - Sorry, here's the current title ladder. I have added 2nd & 3rd team - apparently it didn't get transferred when we moved to the new platform last year. I will also update the content on the link.