They stick just fine to the Amazon cases. Same as to the SU cases. I put about 2 sets in most - but I can see where it would make sense to put a set in each case if that works better with your organization system. One thing I should note - when I am putting the index picture on the clear mount stamp I trim it a little all around the edges. That helps it to stick better. The best "deal" was to get 100 cases - which I split with a friend.
Meow is kind of like Aloha. It can mean anything.