Part of the reason PLD ends up with so little gold is that everytime he has some, he dies. Something of a vicious cycle of playing 6 role support.
At a certain point you need to make a decision whether it's more important to get a ward up in an important position so that the cores can farm or for the 5 position venge to keep the 200ish gold they'll lose in the event that they get picked off in the process of placing that ward. He's not a perfect player by any means, but C9's style requires a player playing that sort of role.