[jdietrich]

They can't. Having someone in the grandstands with a mobile phone used to be the norm, but a drone provides more information with less latency. As in financial trading, there's a huge financial advantage to knowing more than your rivals or knowing it faster. The time it takes to say "two and five have fallen" might be the difference between profit and loss on a race.

[fireattack]

I knew nothing about horse racing so bear with me:

You can still bet when the game has already started or what? Because otherwise, I don't quite understand why lattery would matter in this case.

[philtar]

You can bet until the last second of the race