[VoodooChild]

I do not sell on eBay but there has to be a way for you through settings to automatically combine shipping. I know this because I only (with a few exceptions) buy from sellers who set theirs up that way. If I add multiple cards to my cart and the shipping doesn't automatically combine, I just remove from my cart and move on. Now, if you do figure out how to set that up and you have buyers who do not use the cart and buy multiple cards one at a time paying shipping on each card, then the answer to your question is Yes they are stupid.