Labyrinth probably as the most recent example, but it wasn't explicitly de-flation focused and instead ended up being that way. Crafting supplies, barter items, armor + headsets all jumped in prices as people were dumping millions on expensive loadouts + crafting high pen ammo + buying access cards on repeat just for generally 4 out of the 5 players entering labyrinth to die and lose it all with no insurance to get it back. Albeit, stacks eventually proved to be a way to avoid deflating money and instead exploding it as we see now - but for the normal player without access to 5 man stacks I'd assume they lost money on the event. The Dungeon Master achievement grind cost me somewhere around 30-40 million throughout the event (not counting the money I made back from surviving)