Originally Posted by cordelli

How are you defining breakage?

Some people leave because the benefits may not be worth the effort anymore (see the threads in the Hilton forum for example)

Some leave because they don't fly, stay or whatever as much anymore.

Some are forced to leave either because their company has taken over the travel programs, and they can not choose their airline of choice anymore.

Some are kicked out because of a period of inactivity.

I would bet there's a large amount of people who don't even have a clue they have points or miles, they filled out the brochure but never bother to check, and have orphan miles (small amounts of miles) in many programs, and never pay attention to it.

It could also be they have tried several programs, and settled into one airline and one hotel and one rental program to concentrate their earnings, letting all the others go.