It would take some serious macroing to really pay off, but if you have 8 party members in a party and you drop a pile of 1 adena, and pick it up: auto-split will give 1 adena to each member, making it 8 adena total.
It’s small scale, but it’s a dupe.
Be sure you have your split option set to ‘distribute evenly among party members’ rather than ‘random distribution,’ or you’ll just give the 1 adena to a random member.