Gems Bonanza: what you cannot know in advance
Settle in knowing the bonus round arrives on its own schedule, and you cannot know in advance when that will be. A Gold Fever round can land on your third spin or never in a session, and the result of any single session stays random no matter how the numbers are set. RTP describes the long run, not your evening.
Decide with the rules open, because the return figure lives in the game rules panel and changes between settings. Open the rules from the game screen and read the RTP line before your first stake, so you know which version the figures belong to rather than assuming the highest one.
Treat the maximum win as a ceiling, not a target. It is the theoretical top a round can reach, hit very rarely and never on command. Plan your bets around what you can comfortably spend on each spin, not around the promise of that ceiling landing in your session.