Progressive jackpots are a type of slot machine video poker. The big prize is offered after the game is accessed a certain number of times by different players. The winner is the lucky person that has played the game in the exact number of plays the machine is set up, before releasing the jackpot. The jackpot is released only on a certain combination of cards, a royal flush for example, or a different combination of the most valuable reels of the slot machine.
After the player has won the big prize, the machine will reset itself to the minimum level, which is again to be gone through before a new jackpot. Each jackpot machine has a different setting, dictated by the administration of the casino and the internal rules. The setting is fixed so that they bring the expected profit to the casino before it releases the jackpot prize. Many players are attracted to play progressive jackpots, because the investment for each play is relatively small, in comparison with other games in a casino. The players are also aware of the fact that each small amount put in the machine contributes with a fraction to the big prize.
In some games, such as Carribean Stud Poker or Blackjack, players can calculate the odds of winning. The clues are the growth of the jackpot, which is considered to bring positive expectations to the player, or RTP, return to player. When the jackpot is situated below the winning point, the game is considered to bring negative expected value.
The winnings are also connected to the currency of the game. The games usually have a fixed fee of $1, £1 or €1. However, the true conversion between these currencies are not 1:1. This means that the players wagering in Euros will be close to the jackpot that the other players using a different currency.