I travel a lot for work. As such, I eat out a lot. As such such, I look at a lot of places’ menus without physically being there (since I don’t know the area, I don’t know where to eat, so I look at the reviews and images posted online).
A restaurant’s soup selection will likely not be the thing that decides if I eat there or somewhere else, but sometimes soup is the only side dish that sounds appetizing, and if I don’t know what kind of soup the restaurant serves I’ll probably just pick somewhere else.
Not really. At least, not in a way that doesn’t require constantly updating the website.
“Soups of the day” are generally an outlet for leftovers or a way to use up less desirable parts of other produce without just tossing them, so generally they’ll make whatever they have with what they got.