@ThunderaMaou - I think the plan is to spend gold to amass a lot of mana, and then sell that mana to Greed demons, who don't have their own dungeon, at inflated prices.
So...im guessing the strat is to lure scummy adventurers into a bloodbath, with easy upper levels to encourage shit like what was at the beginning of chapter.
Dungeon still gets souls without having its danger rating rise up, ehile the kingdoms get rid of garbo humans.
Also the bra on the succubus looks weird, is it cause it's 3D or was it censored?