Favoring the Koreans?

http://boards.na.leagueoflegends.com/en/c/GD/ZZgs9Oqf-is-championship-riven-available-for-purchase-this-worlds-need-someone-who-can-translate-korean

This link also has details on this topic but I feel that this hasn't been answered yet so I'll bring back the question... Why was championship riven re released in Korea so much while in other servers it hasn't been re released yet? It puzzles me that they would do this honestly they give championship no hope for an NA person... plz help rito