Can anyone tell when Jammin' Jars will pay?
Before you set a bet of A$0.20 or A$2, accept that nobody can say when the Free Games Feature will land. The bonus comes at random, so a long quiet stretch tells you nothing about the next spin. One session's result is random too, and a published RTP only describes the average over many rounds, not your own session.
Check the game rules before your first spin, because only they show which RTP version this lobby runs. The version table lists both options, yet it does not say which one is live on your screen. Read the rules section of the game before you bet.
Start from a ceiling that is reached very rarely, so the top prize is never a target you can plan around. Choosing a higher bet changes the money at that ceiling, not how rarely it is reached. The rules only fix the ceiling. They do not promise that you will reach it.