Big Bass Bonanza 1000 free spins, no fixed timing
Choosing a stake before the first spin does not tell you when the bonus round will come. How often Big Bass Bonanza 1000 reaches its free spins is not known in advance, and nobody can predict it from the bet or the history of earlier rounds. The result of one session is random, whatever the RTP of 96.51 says about returns over a very long run.
Checking which RTP version runs on Fairgo Casino starts in the game rules. Only those rules state the version in use, so the figure on another site or in a guide does not settle the question. Read the rules before the first spin.
Weighing the top prize starts with the maximum win of Big Bass Bonanza 1000. It is x20,000 the bet, a ceiling that is reached very rarely. At the example top bet of A$5 that works out to A$100,000, but that figure is a cap, and no session can be planned around reaching it.