I tried googling cambridge diet earnings to see what came up, couldnt find anything, but I imagine they earn about 20% to 25%.
I did however find this article on Lighterlife which was interesting. Lighterlife counsellors need no qualifications and can earn 30%, but there is a huge initial outlay to franchise the business. Interesting too about one of the founders who lives in the Bahamas and has a pretty serious weight problem.
I think there's an initial outlay for CDC too, they need to buy a load of the stuff first I think to make sure they have it for when we come. I think they make a canny penny....u should se where my CDC lives!! One of my goals is to be in the healthy bmi range so u can do it too