Okie, I believe I understand what you are talking about now. Still it is just
a Martingale system, but using the chart to construct a betting system for slots. And using the chart you can construct a betting system with this property:
Following the betting system you will win 99% of the times statistically over 1000 spins. (if you are ahead at some time, then stop)
However the last 1% of the times you will lose your house, wife,dog, liver and whatever can be sold etc.
But also remember that that even hitting the feature only gives 35*(bet-size) in average wins for Thunderstruck, so a betting system to do what described above still has to be 'aggressive'.
Zoozie
No, no betting system, nothing. First of all let's forget the progressive betting completely, and stick to flat betting, it doesn't really matter. I understand that no system could produce winnings. No winnings, it's all about minimizing losses with the typical human style for playing slots, which is -EV.
The question is only whether a point or an interval exists besides zero which if you fix before beginning to play, and stick to it, and you don't get the feature, then it is relatively significantly better to stop there than in any other interval later (absolute case is obvious, sooner is better).
With other words, if you don't get the feature:
Stopping after 0 spins is the best, and it is infinitely better than stopping after 1 spins.
Stopping after 1 spins is the second best, and it is x times better than stopping after 2 spins.
Stopping after 2 spins is the third best, and it is y times better than stopping after 3 spins.
And so on. (and that can be extended more generally, like stopping after 42 spins is the forty-third best, and z times better than stopping after 987654321 spins.) These x,y, etc. values should be on a curve.
Please note that it is always assumed that you don't get the feature and you will stop after the planned spins, and you go for the feature by all means. It's obvious that the more you spin, the more you lose. But adding another spin to the planned stop point might have different effect in different intervals.
For instance planning 4 spins instead of 2 might be a relatively better (or worse) decision than planning 22 spins instead of 20, although it costs the same. The question is whether such difference might exist or not.