For example, the RTP at Parx Online Casino is 96%. The RTP of online slots is generally higher than that of brick-and-mortar machines. The higher the RTP, the more profitable they are. In contrast, slots with low volatility give out small amounts frequently, but do not offer as many jackpots.Ī good place to start is by checking the RTP of the games. Games with a high volatility are often riskier and offer high jackpot prizes. Volatility, or the risk factor, is an important factor to consider when choosing which slots to play.