Aztec Bonanza results stay random at every spin
The 96.53 percent RTP describes returns over a very large number of spins, not the outcome of one session. How often the free spins come is not known in advance. The result of one session is random, whatever the RTP, and the same settings can end with a large win or with the full stake lost.
A$0.30 is the lowest bet on Aztec Bonanza, and A$240 the highest. The RTP version in use is shown only in the game rules. Check that section before a session, because the RTP figure in the table is the one listed for this game.
x19,000 is the highest win Aztec Bonanza pays, measured as a multiple of the bet. Reaching that ceiling is very rare, and no session can be planned around it. The money amount depends on the stake, so the same multiple means a larger sum on a bigger bet.