Gil, Materia, and RMT bots

[Toutatis]

That's kinda irrelevant. Materia IIIs (which would be dropping from Wanderer's due to the IL) vendor for only 90 gil each, which would be a cut into their profits even if the droprate for them was 100%. But it's a lot lower than that, go run literally any SB/ShB/EW level cap dungeon and you'll see that it isn't 100%.

But you said that it drops ~190 gil divided between party members. 90 per materia would be more (360 gil). We also don't need more Materia i-iv into the economy. It's already easy to obtain and low level dungeons are super easy. Besides the few quests that require one or two materia, do people really still use low level battle materia? Leveling goes so fast these days with the abundance of XP and it seems pointless. There's much faster ways to farm gil too.