system
A chat on subreddit /r/wallstreetbets
human
There definitely were/are people looking to buy that paper before the payout was/is determined.  Guy had offers of $75k before the game to sell the wager, but refused to hedge.

gpt
I can't believe he turned that down...He was effectively betting 75K to win 25 on one game. 
  
  I would've hedged at least half, since it was a home game for Boston.