I'm going to leap in here and I may well be totally wrong about this but it occurs to me that the reason loads of tricks are marketed as 'examinable' is because they are aimed at magicians who are going to be performing them to
other magicians. This also explains why you quite often see lists of things that the trick isn't:
*No Magnets!
*No Equivoque!
*No Pixie Dust!
*No Invisible Floating Elephants!
The reason being that the traditional way of doing the marketed trick does involve one or more of those things but
THIS version doesn't so you can show it to your magician pals and then reveal that it doesn't work the way they think it does and completely fool them.
Of course, if you were to perform any version of it to the public, they wouldn't even suspect any of the original methods so having a fancy new version which doesn't use them is pretty much irrelevant anyway.
I can't speak for the working pros (but I'm going to anyway

) but I really don't think they care about having a magician-proof method or if it can be examined or not. If it can't be examined, then they won't let it be examined, and it would be a lot better to have a really simple, easy method to use that you can do perfectly 10 times in one evening to each table rather than have something that requires loads of set up or is overly complicated and you could screw up or break.
It's all well and good having a device that can make a card change in their hands but you can still have the same effect using a normal everyday sleight of hand colour change. The card stil changes in front of their eyes, just one will cost you £40 and do just one thing, and the other comes in a book for £6.99 and contains
LOADS of different sleights, routines and ideas.