The loser writes and sends a weekly league recap all season: scores, standings, storylines, and at least one joke at their own expense. Quality is judged; lazy recaps get returned for revision. It is a genuine time tax that also makes the league more fun, the rare win-win punishment.
The long haul: this is not a one-afternoon sentence. With a time commitment of full season, the punishment keeps paying out (for everyone else) long after the season ends. Long sentences need a written end date and a league-appointed enforcer who checks compliance.
Seen in the wild: fantasyleaguelottery.com