As we hit the comic-related stretch-goals, we will be adding these comics to the packages we will be sending out to backers who have backed for at least a physical copy.
In the Domestic US, these comics can be included free of charge. The reason for this is that the US offers a special discount on shipping of media items (books, CDs, DVDs).
For backers outside the US, we unfortunately require an additional pledge ($40 Europe, $45 Canada) to cover the expenses of shipping these items. We wish that this were not the case, but there's not much we can do about it.