A full weekend of yard work at the champion's house, mowing, raking, weeding, gutter duty, while the champion supervises and explicitly does not help. Tool quality is not guaranteed. Lemonade is provided at the champion's discretion, in view of the loser, sometimes not to the loser.
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: fantasyleaguelottery.com · fantasyfootballunlimited.com