So what exploit is this?

[Atomic_Skull]

Thats not alot.

In terms of directly generated gil (items sold to npcs, beastmen drops, etc) its a bit difficult to generate that much. But in terms of farmable items to sell to players, a dedicated person can break that in a month.

Back in the day I paid for my relic by farming wildgrass on 5 accounts. I still have a ton of excess gil saved up from where I built my gil back up for a while before closing down the extra accounts.