RNG chance to get a treasure map from the node ONCE a day.
RNG chance to get PF filled
RNG chance to NOT get a blank map with no ***kin landmarks
[Dragonskin maps] RNG chance it's not on Sea of Clouds with triple layers of sky to check
RNG chance that spot on the map doesn't have an A/S rank sitting on top of it. (Yes! It happened!)
RNG chance to get a portal
RNG chance to pick the right door
RNG chance to get a thief
RNG chance to get that piece of rare glamour mat (and hope your party respect the owner's need rule)

It's the true endgame