Nowadays when you return an item to a store, the customer service people may not even ask you why you are returning it. Then the item gets shipped to a warehouse or factory and is sold at a lower price. The company "takes the hit" on the item.
The Church, the "Company of Witnesses," has lost her share of adherents over the years. It has become a topic of studies and reflections (such as this one by the Nat'l Cath Reporter, this posting by a priest from Phila, and America Magazine's Fr. Byron, a co-author of one recent study).
One blogger asks not the usual 5 questions to people who are contemplating a departure. The business of "loss prevention" is worth undertaking, long overdue.
Another question worth asking: "Why are you staying?"