Knowing what the maximum win cannot promise
Deciding whether to keep spinning means accepting that the bonus round has no known timing. How often Free Spins come is not known in advance, and the result of one session is random whatever the RTP. Past spins do not show when the next trigger lands. A high RTP describes the long run, not the session you are in now. Only spend what you can afford to lose.
Checking which RTP version runs here starts with the game rules, since only they show it. The figures in the table on this page describe that version as printed. Read the rules before the first spin.
Setting expectations for the top prize means treating the maximum win as a ceiling, not a target. Very high volatility means that ceiling is reached very rarely, so the number on the screen describes the edge of the game, not its usual result. Judge the game by the payout table and the feature rules instead.