Important: found this out the hard way, you only get free shipping if you click the pop-link on your first attempt to access the page.
If you subscribe after refreshing the page/via any other subscribe link, you won't get the free shipping. The free shipping link is clearly labelled on that initial popup. bit strange.
If you missed it, log in on via another device or clear cache and remove cookies.
This is a print company like vistaprint that does good quality prints of stuff. They are in the UK hence why shipping is rather exorbitant.
Unique code was emailed shortly after.