How often will the bonus round actually land?
Three Golden 7 symbols anywhere on the grid start the Jackpot Bonus Game, but no one can say in advance how often that happens. The same holds for the scatter symbols that open the Free Spins. The result of one session is random, whatever the RTP, so a quick loss or a run of wins tells you little about the next spin.
A$0.15 is the lowest bet and A$240 the highest, but which RTP version PokerStars Casino runs is shown only in the game rules. Read those rules before you start a session, because the figure stated there is the one that applies.
1000x the total bet is the MEGA tier, the largest fixed prize in the Jackpot Bonus Game, but the maximum win of Diamond Strike is a ceiling reached very rarely. Nothing in this review makes it a target, and a session can end well below it. Plan each bet around the money you can afford to lose.