I just started Eureka.

[Nariel]

And is 5-minute content, I'm sure you wouldn't run long-running farm parties without a reward.

Well, the whole point of "farming" is to running after something... You can't farm fun so whats yout point ? People do just for the reward ? Some sure do but... There so many people speedrunning games for the sake of it, beating hard game with as much handicap as possible for no reward... If its fun people will do it, its a game, nobody get any reward for playing it to begin with, if its fun it don't need that much different reward hidden under so much RNG... Make it fun first and then give player a treat for doing it.