“EXIT” – Export Across Instances Tool
This is a simple and self-contained tool that helps automate the process of exporting your magazine subscriptions from one instance to another, provided you have accounts on both.
Could also be used to copy subscriptions from one named account to another named account on the same instance, or to back them up for later.
Instructions and tool available here
Code runs locally in your browser only.
I have made some modifications that should prompt you to click a button to copy the contents to the clipboard, rather than doing it automatically. This is done because Safari only permits modifying the clipboard if there was direct user interaction. Can you try again?