Good point. Donner has been doing tourboxes for years now, if I remember correctly, and it must be for a reason. I took part in the Bearfoot Euro Tourbox, I got it in late Nov/early Dec I think and since then I´ve been jonesing for a MGMV (will get one as soon as the damn Euro-Dollar ratio improves).
How many guys take part in a tourbox thingy? Not many really. I don´t see sales of used gear get undermined (it´s just another guy buying the stuff eventually) and as far as dealer/manufacturer sales are concerned I GUESS the number of 'lost' customers might equal the number of new and convinced customers. Those who won´t buy before trying for example.
In the end, I see a chance that there´ll be more happy customers than without tourboxes. Those who are happy they didn´t purchase the item in the first place cause it´s not for them and those who are happy they took part in the tourbox cause they eventually bought smth they wouldn´t have if they didn´t join the tourbox group.
Also, ecologically I find it more appealing that one box of pedals is being shipped across the pond and then distributed on the European continent for instance instead of the same number of people ordering from the US individually and half of them returning stuff cause it´s not for them. It´s just shorter distances as a whole, I guess. I might be wrong though.