IMO the "traded car" analogy is irrelevant in this context. Firstly, it's not a product that will become "used" per se and VSL is not re-sellable. Also, the guarantee that you never pay for the same thing twice does hardly fit into that context either.
In this case, it's not a question about how much use a customer has gotten in the past from his/hers products, but rather how many products he/she purchased in the past.
The VIP program is a major selling point for the VSL products and I'm sure one that many customers take into consideration before buying. This means that if VSL deviates from this guarantee ever so slighltly (even in the neighbourhood of cents) they would have not only broken it but also broken the trust of many old and loyal customers.
It's part of why you buy VSL...the fact that being an old and loyal customer will ensure you that you will not lose money in the upgrading process. They made us a promise, and now we expect them to live up to it. It's as simple as that and has nothing to do with used cars.
However, let me give you an example (I've used the Solo Strings because the info is available, although by the sound of it, other old customers might be even "worse" off):
If someone for example bought the "old" Horizon Solo Strings for the full price...he/she would have payed €445 for the 16 bit/44.1 kHz samples and without the Vienna Instrument.
However, if a brand new customer buys the VI Solo Strings he/she only has to pay €345 for the 24 bit/44.1 kHz samples and including the Vienna Instrument.
Not only does this mean that the old customer has to pay more initially but he/she is also forced to buy the extended VI version in order to "get the money back" he/she already invested into the VIP program...but furthermore...if you add it up, this is what you get (again Solo Strings example):
New customer: Standard VI Solo Strings + Extended VI Solo Strings = €345 + €445 = Total of €790
Old customer: Horizon Solo Strings + Standard VI + Extended VI = €445 + €345 + €30 = Total of €820
Not only does an old cutomer have to pay €790 just to get the VI Standard version (whereas a new customer only needs to pay €345 for the same step) but the old customer also pays a greater total in the end (€30 more to be exact).
This must of course mean that the old customer does indeed pay for the samples he/she already own...or else the total would be exactly the same?
Finally, it's not the amount of the difference that is important, but the principle. VSL made a promise and guarantee to their customers that they never have to pay for the samples twice when upgrading. Does VSL intend to honor this promise or not?
Rodney