I think the rule said something about the next morning or before the races started.
Questions
1) If you wager $1000, and get back $70, does that $70 have to be bet on horses or can it be bet on sports?
2) Since the $70 is bonus money, can it be withdrawn immediately (though fees would take a chunk out)?
3) If a player gets that $70, and uses it to win a 8-team parlay, can the player keep all $8000 (or whatever the payoff is) without any additional rollover requirements or restrictions?