Again great questions, and honestly, the answer is we just didn't think we'd reach an international audience this quickly! But as we have, we absolutely love the idea of embracing international supporters and shipping out to them.
If you live outside the US and would like to donate to these rewards, please just contact us at admin [at] brokencrowngames [dot] com, and we will work with you to find out how much additional cost will need to be added to adjust for your particular location, and will ask that you donate the reward cost + our stated additional shipping cost and we will gladly ship!
Unfortunately TIER 3 has already been donated to, so we couldn't adjust it any longer. As for TIER 4, we'd prefer to keep costs down as much as possible for supports, so rather than just quote a "flat international rate", we'd prefer to work with you to find out the most cost effective shipping method for you.