skyjedi2005 said:

But from a money standpoint its brilliant marketing keep changing the films so people continue to watch the product.

Hard to say if that's why people buy them again & again--"to see the fresh new stuff in each release".

It could just as easily have been:

- Bought the 1997 set because it's close enough to the movies I want and it's on DVD so it looks way better.

- Bought the 2006 set because it includes the films I actually want in DVD quality (dang! they fooled me!)

- Bought the 2011 set because it's close enough to the movies I want and it's on Blu-ray so it looks way better.

Probably a mix of reasons, but for all those who love the changes and eat them up with every release, I can't believe there aren't a lot more who simply grudgingly tolerate the changes.

Either way, I'd agree it's been a successful marketing strategy, except in 2006 when it was a clear bait-and-switch... which I suppose could also be considered a "successful" con job.