I don't play the Lucky pot game, however I'm updating the sylestia wiki on it and I want to make sure the information is correct, so what exactly is the progressive Jackpot and how does it work?

Every time someone plays the game, the jackpot increases by a certain amount of gold.

Everyone has a chance to win the jackpot, only if they can find three of the jackpot symbol. So the jack pot will keep increasing until it's won, then it's reset and the cycle continues.