[gosub100]

They should have some kind of controls:

- throttle how much a new account can wager, allowing more to be placed after the account gets older

- limit double-down bets to some fraction of your initial. To reduce the benefit of last minute wagers

- end wagering at a random time before the deadline.

- ban accounts that act in concert to evade the throttling. Or charge a hefty one-time fee or escrow that you eventually get refunded