I think the Tera Burning event invites old players to play the game more often. It unlocks the possibility of consuming important content faster. I came back to play with some friends, and we were playing some hours occasionally.
We played for a week, and then the event was over without getting to LVL 200. After that, we just got discouraged and stopped playing. I know that it is pointless, but I am sure that some people agree with me out there.
