to be fair you can just buy maps and do them all day if you want.

on behemoth right now peisteskin maps are cheaper than what a 4 man group generally gets in gil alone and anything else is just bonus

the rewards on them need to be normalized a bit though, one day the thing can flood you with HQ crafting mats a philo item and a treasure chest only item and the next day you just get the gil, crystals and 1 feather. It seems a bit too random imo