Bonus Timing and Session Results
Choosing your bet size means accepting that no one can say when the bonus round will come. Its timing is not known in advance, and the result of one session is random whatever the RTP version. Each spin stands alone, so a long run of losses tells you nothing about the next one.
Checking the RTP before you play means looking in the game rules, since the version running in this lobby is shown only there. The versions differ in long-run return, and the table turns each one into money per A$100 staked.
Planning around the maximum win means accepting that the ceiling of x8,000 the stake is reached very rarely. The figures in the table show what that ceiling is worth at each bet, and none of them is a forecast.