Not sure how much space the leftover candy takes up, but twice a year (maybe once in the summer and once before the winter holidays) you could sell $24 boxes of random leftovers from the year. Would be great for new subscribers. You could even give the option of doing a random box + first month of a subscription for $36.
Thanks, in response to HN suggestions I added the option to get a sample envelope, for which I can use the extra items. I think I already sold a few dozen, now just need to write another script that finds those orders on PayPal. Their site is painfully slow to navigate by hand.
