Every business the loser visits for a month gets a Google review written entirely in haiku, minimum 50 reviews, under their real name. Five-seven-five, no exceptions, all sincere. Local business owners will be confused and occasionally moved.
The long haul: this is not a one-afternoon sentence. With a time commitment of one month, 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: fantasypunishments.com