If you had played that game plus another game (that goes tomorrow) on a parlay, and you could have bought back some of the other game ...
You get a two-team parlay for $300 to pay $780.
Once you win the first game (which was what you won tonight), tomorrow you buy back $370 worth of the second game for $407.
If the second game loses in the free-play, you win $370 on the hedge
If the 2nd leg of the parlay wins, you lose the $407, win $780 on the free-play and you're still up $373.
This way, you win $370 and the way you did it, you won $272.
Also, any winning on a free-play has a 5x rollover so the hedge also helps the rollover if the free-play wins.