Bonus frequency and session totals
The reels land a random result on every spin, and the Free Spins round starts only when Scatter symbols land. How often it appears cannot be known in advance, and earlier spins do not reveal it. The outcome of one session is random whatever the RTP, so one session can finish well above or well below its expected return.
Each spin on the 5x4 grid returns at the RTP version this lobby runs, and only the game rules name that version. Open the game rules before the first spin to see which version applies. The version listed there is the one that governs every round you play.
Wild symbols that land in Free Spins collect the cash values of all Money symbols on screen, yet the round win stops at 4000x the bet. That cap is the maximum win, and it is reached very rarely. No session can be planned toward it, so treat the ceiling as a limit on payouts rather than a goal.