Knowing what Free Spins timing leaves open
Scatter symbols land at random on the reels, so the Free Spins round can start on the first spin or stay away for a long stretch. How often it comes is not known in advance in Big Bass Splash, and one session of play is random whatever the RTP says. Two sessions with the same bet can end with very different balances.
Each spin on the reels runs under one RTP version. Which version Fiz Casino runs for Big Bass Splash is shown only in the game rules, not on the reels. The RTP is a long-run average, so it promises nothing for one session.
A win on the reels can reach the maximum win of x5,000 the bet, a ceiling that is reached very rarely. At the A$1 top bet, that maximum win is A$5,000. Treat it as a limit on the top prize, not as a target for any session.