> The likely reason is that Europeans don't write 1 just as a stick. It starts with an angled upstroke.
I'm European, and that's how I write it, but if you look at the link, that's not how they write 1's in the promotional material - Those 1's follow pretty much the stroke I would do for an L, only the foot is shorter and slightly more pointed upward.
I see that. Yikes! The hand in the photo (we are to undestand) copied a pair of nicely typeset 1s, featuring with an upstroke and serif foot, into a pair of sloppy hockey sticks that looks like lower case l's due to the pen trails, and could be taken for I.
I'm European, and that's how I write it, but if you look at the link, that's not how they write 1's in the promotional material - Those 1's follow pretty much the stroke I would do for an L, only the foot is shorter and slightly more pointed upward.