On a public livestream, the loser counts aloud from 1 to 20,000, taking roughly five hours, with the league dropping in to heckle and verify no skipped hundreds. It is pure, uncut tedium with an audience. The stream recording becomes league archival material.
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.