When you wait for a bonus round
96.50% is the RTP of Gates of Olympus and it describes a return over a very large number of spins, not one visit. How often the bonus round comes is not known in advance. Each spin is random, so the result of one session can sit far above or below that RTP.
96.50% marks the version listed for Gates of Olympus. Which RTP version is running is shown only in the game rules, not on this page, so read that rule before the first spin and compare it with the figure in the table above.
x5,000 is the maximum win of Gates of Olympus, a ceiling on the multiple of the stake. It is reached very rarely, and no session can be expected to reach it. Read it as the upper limit of what the game can pay.