For those wondering, when using the biggest QR code with the maximum error correction (10,208 bytes), 1,454,942 QR codes is slightly less than 14GiB, which should be more than enough for a Windows ISO.
My math: (1454942×10208)÷1024÷1024÷1024≈13.83
Edit: Damn another guy beat me to it, now I wonder how I'm so far off.
ghost
is just GitHub's way of saying deleted user.