When will the Retro Tapes bonus round land?
Deciding how much to stake before the first spin will not tell you when the bonus round arrives. How often it comes is not known in advance. The result of one session is random whatever the RTP, and a short run can finish far above or below it.
Checking which RTP version you play starts with the game rules, because Crownplay Casino shows the version in use only there. The two versions of Retro Tapes differ in RTP, so the rules matter before a session starts.
Chasing a big win starts with knowing its ceiling. The maximum win of Retro Tapes is 10,000 times the bet, which is A$5,000 at the top example bet of A$0.50 and A$1,000,000 at the A$100 max bet. Reaching that ceiling is very rare.