: #1 is simply a way of constructing a bet selection that will perform better. The improvement varies on a case by case basis but here is an example of the concept:
Let's say you want to bet 3 straight up numbers. That is your actual target. You could set up your progression and triggers based on that and that would be fine right? But what if you put in a double street? For just one chip more you could cover SIX more numbers for a total of NINE. Sure it only pays +1 unit but look at the effect on your target bets; those 3 straight up numbers don't go missing as long or as often -- an edge; I guess some people have called this "insurance".
I made this post for system designers who are looking to increase the performance of their systems, myself included and regardless of any nay-saying, these techniques work!
You want to see a further improvement? Try randomizing the 3 numbers you bet every time they hit; you will notice the max expected loss shrinking further. Add Harry/Pales betting range technique using an optimal trigger and segmented bets with a delayed progression and you will see even more significant improvement!
Its not easy to improve system performance results; many things simply do not work. :/