Opening the game for the first time
Scatter symbols land anywhere on the 6x5 grid, and four or more of them start the free spins. No one can tell in advance when that happens. How often the bonus round comes is not known before you play, and the result of one session is random whatever the RTP. The RTP describes the return across a very long run of spins, not your next visit.
Each spin on the reels pays back at one RTP version, and the game rules are where that version is shown. Read them before you start, because a figure only means something once you know which version it belongs to. The table below shows what each version returns on the same stake.
Tumbles on the reels can stack into large wins, but the maximum win is a ceiling that very few spins reach. It is set as a multiple of your bet, so a bigger stake raises the ceiling in money. Nobody can predict whether a session will get near it.