Hi Invicti,
My understanding is that the explanation that the subconscious will only hold so much new instructions and the rest "spills over" has to do with viewing the modules more than once a week. People like to view their theatre more than once a week for lots of reasons, and the company has explained it absolutely can't hurt to do so, and in some cases seems to accelerate results -- but that the system was designed to deliver instructions in a time-released way, over a period of 7 to 10 days.
As to viewing more than 4 modules -- lots of folks are on more than 4. I personally am on 12. And I see results from each of them, and I also see them kind of cooperating with each other, working together. So it's definitely not a waste of money. There has been some discussion of whether it makes more sense to start slow (1 or 2 modules) and wait till those kick in before adding any more...some people say it works better that way for them and some people (me for instance) just jump right in and figure it'll all work out in the end.
I'd say if you feel drawn to adding more modules go right ahead. It's certainly not a waste of money. Just be prepared that you'll probably need more spirulina. Also, one thing that I've noticed for me is that because I am on so many, I can't always dissect which result is coming from which module -- that's especially the case for modules like Self Esteem, Positive Thinking, and the Successful Living series.
But I don't care. I know I'm internalizing instructions that are going to contribute to me living my best possible life, and that makes me happy
Hope this helps. I'm quite sure others will weigh in too.
Chansonette