Because, the White Paper sentence format is diverse, there have hyperlink, formula, image and so on. use pure text like loot project is not beautiful and hard to spread. Loot project has fixed fieled and the format is uniform, so it looks not confusion.

I have desiged a QR code, which embeded the big bitcoin logo into it, it looks harmonious, and every QR code has an serial number in the foot of it.

The example and project details can be found here https://qrpaper.github.io/