Retro Tapes results nobody can predict
Deciding how long to keep spinning means working with a figure nobody holds in advance: how often the bonus round arrives. Retro Tapes gives no schedule for it, and the result of one session is random, whatever the published RTP says. The RTP describes returns over a very large number of rounds, not over the evening you are playing. Read each session as a separate outcome.
Choosing how to play Retro Tapes starts with knowing which RTP version runs in front of you. The two versions are close, but they are not the same game setting. Which RTP version Kingbet9 runs is shown only in the game rules, so read that section before the first spin.
Deciding what a big result could be worth starts with the ceiling. The maximum win of Retro Tapes is x10,000 of the current bet, which is A$10,000 at the example bet of A$1. That ceiling is reached very rarely, and nothing on this page predicts when. Treat it as the top of the scale, not as an expected payout.