The loser works a free shift as a roadside sign spinner, either for a real local business that agrees to it or with a league-made sign about their fantasy failure. Several hours of arm cardio and public visibility. Enthusiasm is mandatory and graded.
Budget note: this one costs nothing but dignity, which makes it a strong pick for leagues that would rather spend the pot on the champion than on the loser's downfall.
Seen in the wild: fantasyfootballunlimited.com