Hello,
A lot of citizens outside of US should be able to get lower tax to avoid double taxation. When using all other platforms that reward creators I’m able to always get decreased US tax of 10% instead of 30%. This is the case for all Polish citizens. Some countries have it even at 0% like Ireland.
Example platforms: Steam, itch.io, humblebundle, youtube, twitch.
For some reason this option isn’t available when filling Island Creator tax forms. I’ve noticed recently the form started asking for Tin/Foreign Tin but even then there’s no tax deduction.