While you can win $1,000s on each wager, the odds of winning are constantly fluctuating.
Why? b spot is authorized to conduct pari-mutuel wagering on live horse races, meaning each wager is placed in a pool alongside other wagers. Odds often change—up until the race starts—as money enters the pool and is placed on different horses.
Note: You can always see Wager Details before confirming a wager with b spot. This shows the Morning Line (where odds began) and the current odds for each horse.