Before your first spin, nothing is fixed
The 8x8 grid holds 64 cells, yet how often the Free Spins round arrives is not known in advance. No one can predict the next spin, the length of a session or the size of a bonus. That stays true whatever the RTP is. The RTP describes the return over a very large number of bets, not what one session will pay.
96.49 and 96.50 are the two RTP versions of this game, and only the game rules show which one is running. The gap is 0.01 points, so the version matters less than the high volatility. Open the rules before you spin to see which version applies.
x50,000 is the ceiling of this slot, the most a single bet can return, and players reach it very rarely. Treat it as the top of the scale rather than the expected result. A large win needs a long run of luck that no one can plan or repeat on command.