The first session, before anything is known
Before you press spin, accept that the Free Spins round lands at random, and nobody can know in advance how often it will come. The result of one session is random too, whatever the RTP. A high RTP describes a long run of many spins, so a single visit can end well above or well below it.
Check which RTP version is live before you trust any return figure. That detail appears only in the game rules, so read them before you bet. Two RTP versions can sit behind one title, and they pay back a little differently over the long run.
Treat the maximum win of Sweet Bonanza Super Scatter as a ceiling, not a target. It is reached very rarely, and this page does not state how often. Set a fixed budget before you start, and stop when it runs out.