Bigger Bass Splash maximum win ceiling
The 96.50% RTP is a long-run average across very large numbers of spins, not a promise for one session. How often the free spins arrive is not known in advance, and a session can end well above or well below that average whatever the RTP says. Two players with the same bet can see very different outcomes on the same afternoon.
96.50 is the RTP of the version described on this page. Which RTP version is in play is shown only in the game rules, so check them before the first spin. Other titles in the series carry their own RTP, and the rules are where those differences show up.
x5,000 is the maximum win as a multiple of the bet, a ceiling reached very rarely. Converted into money it depends on the stake, and it is a limit rather than a target. Nobody can plan a session around reaching it, so size each bet to what you can afford to lose.