Before the spin, the reels decide
3, 4 or 5 BONUS symbols in the Base Game award 6, 8 or 10 Free Spins, but how often those symbols land is not known in advance. The result of one session is random whatever the RTP version, so a quiet stretch says nothing about the next spin and a fast trigger says nothing about the total.
94.31%, 96.29% and 96.33% are the three RTP versions of Masked Mayhem, and each one is quoted for A$100 staked. Which version 77 Casino runs is shown only in the game rules. Read those rules before you assume a figure.
A$100 is the highest bet allowed here. The maximum win of Masked Mayhem is a ceiling that is reached very rarely, so treat it as the limit of the game, not an expected result. A session can end well below it, and nothing on this page says when it will be reached.