Events allow players(all players) to receive freebies which is better compared to other shower events where you leave empty handed. Economy is good since Farming sites are PK maps so farmers cannot really abuse "zeny farming when other players go and kill for fun (hell its part of the game)". Rewards for PK and MVP king are available as well. Vending is somehow unorganized and makes NPCs harder to detect but that's normal. Would've been better if players cannot vend 2-3 cells near NPCs though.