It is used quite often when betting on horses. Quite simply you make a bet and if you win you reinvest your winnings on your next bet. When you do this you 'let it ride'.

While this system is not free of risk, it offers the least amount of risk of all wagers because the the player is only concerned with either a win, place, or show selection or a combination of the three.

It is one of the oldest methods of wagering.