It depends on perspective! Maplestory can be toxic to you, it can be a drug to you, it can be a friend to you, or it can be a chore to you.
(Woah I listed more negatives than positives), maybe my perspective is getting closer to the dark side !!!
oh I thought SavageAce posted a memo or some update regarding the Kanna rework that's coming later this year. Also, by definition it isn't cancer. Correct me if I'm wrong. But as of "now" when people are leveling up 250+ especially with the help of Kishin, they're not really getting high exp rates.