After seeing posts here about how the Heller's (BLESS them!) don't update the site, and how this has ended up a kind of "orphan plan" with no dedicated forums on its own site, I found myself wondering whether it's because it can't really spawn any merchandise, in the form of dedicated snack bars and whatever?
Because your RM can include anything (in CALP within reason, and CAD is a lot more liberal "Have two desserts if you wish." p.122 CAD) there's simply no ROOM for special frankenfood soy methylated-glycolated blah bars that are almost like
food....
Every plan from the old F-Plan to Atkins & paleo have endless marketing capacity, but CAD & CALP? Not so much.
Because the unique selling point is "normal foods once a day" that exact USP can't be turned into profit and so probably, the Hellers didn't get the interest from food mnaufacturers to make tie-ins, and so the whole commercial bandwagon never got started, which is what then keeps a diet in front of people's eyes in the shops & media, and makes it a talking point.
Even the "Carb, Calorie & Fat Bible" books that come out yearly are made by an organisation with ties to the aspartame and AS industry, so a key tool in supposedly neutral calorie counting tends to be funded by industry, and not motivated by ideals (which after all won't usually pay the bills!).
Just a theory, I think the Hellers did a great thing there (their thinking informed and improved my choices for years) so obviously no disrespect meant.