Do you always tick the box to get the three free auto relists, and do you always check the forums for a link to the extra free listings that we get?  Have you got your preferences ticked to receive promotional emails from ebay, which is what you need to do in order to get the emails for the extra freebies.  The links in the forums usually work but it doesn't hurt to have the right boxes ticked in your preferences as well. 

We had 150 free listings very recently and if you'd used all of those and had the auto relist box ticked, you would still have 150 listings now, minus any that had sold.  That's on top of the 40.

If you have everything on 10 days and tick the auto relist box each listing would run for 40 days, which would allow you to have approx. 50 running at a time even without the extra freebies.

Have you thought about listing your cards in a different category and not crafts?  I have no idea what categories are available but I'd imagine a lot of people buying cards wouldn't necessarily think of looking in crafts.  They may not be looking for handcrafted cards but if they saw them in another category they might buy them.