This makes sense, because Base64 is often used to encode binary data in a format that only allows plain text. As of January , iPhones have this feature built into the camera app under iOS

Samsung Galaxy S9 Plus. A QR code consists of black squares arranged in a square grid on a white background, which can be read by an imaging device such as a camera, and processed using Reed—Solomon error correction until the image can be appropriately interpreted. Archived from the original on 8 August

MaxiCode ShotCode. The chances were high that they would forget to visit the site later, not bother to type a URL, or forget what URL to type. Figured it out.