For most of the tiers, we're charging shipping up front through Kickstarter and then fulfilling ourselves. However, for countries outside the US and Canada, shipping costs can be variable and unpredictable. We wanted to offer an option that would allow folks to back from anywhere without needing to price out a ton of shipping options up front (and then hoping rates don't change).
So we're offering international shipping through our Shopify storefront. When the zines are out, backers at this level will get a unique code for a copy of the zines (or the box set, at that level) from Shopify. They then checkout through our storefront and get Shopify's discounted shipping rate. They can also add on anything else from our store and bundle shipping.
If you want an estimate of what shipping might cost, you can check the rates for your region on our current zine inventory at: narrativedynamicspress.com