You should not buy it. There is high chance that you will be scammed or might get red trust. If you are unhappy due to restriction that newbie account have, then you should buy Copper membership. https://bitcointalk.org/index.php?action=credit;promote
Your post history is in korean, so you should check in your local board. But if there is lack of merits in your local board and you have fair English skill then you can contribute in the discussion here.