OldGreyEagle Sorry if I was confussing about the term "numbers". What I meant was, if each troop feeds into one venture crew, the council looks good because they have doubled the total number of chartered units. If each crewmember is dual registered with the troop then, on the books,they have just doubled the number of scouts. This looks great on paper when you are trying to raise money.
In the past year I have seen many units fail. I believe that it is because Troops started their own Venturing Crew and the adult leadership and the scouts are spread to thin to do an effective unit. But if say three Troops feed into one Crew then the unit is larger and more effective.