Sometimes the large shares get more of certain items and sometimes the large shares get items that the small shares do not get.  There are a few reasons for this:
Sometimes the farmers only have enough of the item to provide them to the large shares.
In other cases, the item may be valued at a price higher than the allowance for the small share.  For example, during one week last season, the large shares all received a watermelon.  Because of it’s relatively high value, it wasn’t practical to give the small shares a watermelon or the rest of the share would have seemed skimpy.  State regulations prevent us from cutting fruits and veggies so simply cutting melons in half isn’t the answer.
People who get large shares pay 50% more than the price of a small share.