Known paytable, unknown session: Mustang Gold
Deciding to spin Mustang Gold means accepting that how often the bonus round comes is not known in advance. The result of one session is random, whatever the RTP says. A long run of spins can bring nothing, and a short one can bring several features. Set a budget you can lose, and stop there.
Checking the RTP version before you play means reading the game rules, because that is the only place it is shown. The RTP figures in the table describe a long-run average, not a single session. Compare the version named in the rules with the one you expect before you stake money.
Chasing the maximum win of Mustang Gold means aiming at a ceiling, not at an expected payout. The maximum win is a ceiling that players reach very rarely, and it is shown as a multiple of the bet. Read it as the top of the scale, not a target.