Basically, that number is a result of a lot of research and experimentation. That is how long it takes to change a habit, and that is how long regular subliminals take to work. In many cases, mine work faster than that, but for a good impact, it’s smart to go with the amount of time it takes to change a habit. I have also seen firsthand that it’s a really good amount of time to use the subliminal, get the result, and have it last.
This is for Type B subliminals, of course. Types C, D and E take longer.
AM and other 6 stage sets are designed specifically to be used for a set amount of time per stage. AM is 32 days per stage for the above reasons, plus other reasons which have to do with the specific design of each stage’s script. Follow the directions to get the results you want.