"...and after mortals finish eating that pure bliss and pleasure they themselves become the food that is eaten by followers of gluttony for all eternity."

"That shit's messed up, are all hellspawns sadists or something?"

"Hmm? Do you really think that from so many different beings entering hell all of them just coincidentally happen to share such a personality trait?"

"...Why then all that pain?"

"What drives large amounts of people coinhabiting together to act in mostly similar manners? Economy and politics of course."

"What? What would that have to do with inflicting pain?"

"I told you didn't i? Dust comes from souls. It is the 'solid' form of refined soul energy."

"Refined? You mean the memories of a soul?"

"Memories, personality, experiences, yes, that is what dust actually is, of course you won't be able to get those memories from dust, it is just their most basic building blocks, grinded from it's soul to dust that we consume."

"So that is why everyone inflicts pain? They are grinding souls?"

"Well... yes and no. The actual method of grinding souls is done in a different way, but the thing is, that there has to be something to grind, and normal accumulation of memories is slow, pain is a good way of making strong memories fast, making the soul attach more energy into said memories and subsequently obtaining more dust. The more a soul suffers, the more dust it produces for us, and thus, economy."

"Huh... didn't expect that..."

"Of course ever since hell's creation the system's, and by extension the god's and reincarnating race's, hatred and active hunting of hellspawns haven't exactly helped to maintain amicable relationships between us, so there is actually a large number of hellspawn that receive pleasure in torturing of souls from system races. And we will be labeled evil either way because part of the reason the system doesn't try to destroy us is because that way it can keep system's gods and heretics in check by sending us every poor fool who tought estudying souls to try and overthrow the system was a good idea. So there you have it, politics. In exchange for that fear factor we gain 'rebellious' and 'evil' souls from the system each batch, now that doesn't mean that any forces of 'good' won't try to kill us the instant they see us, but it means that if someone wants, we can be summoned to any of the realities under the system without the system interfering to personally destroy us for 'stealing' soul dust."

"Wait, then... who pays us? The summoner loses part of their soul each time or...?"

"Heh. Now that i would want to see.... but no, the summoner pays in objects from that reality or the unrefined energy of their soul to the pact and then the pact judges the payment and sends the appropiate summoned and later pays them from the official reserves of dust."

"And as pride is the holder of the pact he is basically the official head of hell..."

"That's right, his followers are official functionaries and they are the ones running hell's calendar and official store, so they are the ones to decide what from the warehouse is offered in each cycle and for what cost and everything bought this way contributes to the pact's dust reserves."